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  • taxonomy  (95)
  • Springer  (95)
  • Annual Reviews
  • Blackwell Publishing Ltd
  • 2005-2009
  • 1990-1994  (67)
  • 1980-1984  (28)
  • 1955-1959
  • 1992  (35)
  • 1990  (32)
  • 1984  (28)
Collection
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  • 2005-2009
  • 1990-1994  (67)
  • 1980-1984  (28)
  • 1955-1959
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  • 1
    Electronic Resource
    Electronic Resource
    Mitochondrial DNA analysis of Exophiala jeanselmei and Exophiala dermatitidis (1990)
    Springer
    Mycopathologia 110 (1990), S. 107-112 
    Details
    ISSN: 1573-0832
    Keywords: DNA ; Exophiala dermatitidis ; Exophiala gougerotii ; Exophiala jeanselmei ; mitochondria ; restriction profiles ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mitochondrial DNA (mtDNA) analysis with Hae III, Hind. III and Msp I was performed in 45 Exophiala jeanselmei strains (30 Phialophora jeanselmei and 15 Phialophora gougerotii strains) and 31 Exophiala dermatitidis strains. The results were as follows, 1) P. jeanselmei and P. gougerotii are identical, 2) E. jeanselmei is classified into 18 types based on restriction profiles, 3) two strains of E. jeanselmei CBS 577.76 and CBS 578.76 are identified as E. dermatitidis, 4) E. dermatitidis has no intraspecific variation and is definitely distinct from E. jeanselmei, 5) E. jeanselmei is suggested to be a complex organism because of extensive mtDNA polymorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446999
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical taxonomy of fluorescent Pseudomonas associated with tomato roots (1990)
    Springer
    Antonie van Leeuwenhoek 57 (1990), S. 223-236 
    Details
    ISSN: 1572-9699
    Keywords: fluorescent Pseudomonas ; root associated ; siderophores ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The phenetic taxonomy of 110 fluorescent bacterial strains, isolated from the roots of tomatoes and other plants was numerically studied through 97 features including 69 assimilation tests. Thirty-two reference strains of various Pseudomonas spp. were additionally included. The strains clustered into 16 clusters at the 74% similarity level when using Jaccard similarity coefficients. Almost all field strains belonged to the P. fluorescens/P. putida-complex while none clustered with P. syringae and allied bacteria. The biovar II branch, as well as the newly described biovar VI of P. fluorescens, made up 55% and 20% respectively, of the field strains; two % were allocated to P. fluorescens biovar I and three % to biovar IV. Eleven % of the root associated strains were designated P. putida; six strains were biovar A, three strains biovar B while four strains could not be referred to any known biovar. The continuum within the P. fluorescens/P. putida-complex as well as the taxonomic status of the six biovars of P. fluorescens and the three biovars of P. putida are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400154
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  • 3
    Electronic Resource
    Electronic Resource
    Zygozyma smithiae sp.n. (Lipomycetaceae), a new ambrosia yeast from Southern Africa (1990)
    Springer
    Antonie van Leeuwenhoek 58 (1990), S. 95-98 
    Details
    ISSN: 1572-9699
    Keywords: Zygozyma smithiae ; Lipomycetaceae ; ambrosia yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species of the genus Zygozyma, Z. smithiae, was recovered from frass of the ambrosia beetle, Crossotarsus externedentatus in Northern Natal. A description of the new species and key to the genus are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422723
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  • 4
    Electronic Resource
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    Arxula gen. nov. (Candidaceae), a new anamorphic, arthroconidial yeast genus (1990)
    Springer
    Antonie van Leeuwenhoek 57 (1990), S. 59-61 
    Details
    ISSN: 1572-9699
    Keywords: Arxula ; Candidaceae ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The new genus Arxula is proposed for the classification of xerotolerant, ascomycetous, anamorphic, arthroconidial yeasts. The genus is considered to be of endomycetaceous affinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400338
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  • 5
    Electronic Resource
    Electronic Resource
    Kurtzmanomyces tardus sp. nov., a new anamorphic yeast species of basidiomycetous affinity (1990)
    Springer
    Antonie van Leeuwenhoek 58 (1990), S. 129-135 
    Details
    ISSN: 1572-9699
    Keywords: basidiomycetous yeasts ; Kurtzmanomyces tardus ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new yeast species of basidiomycetous affinity Kurtzmanomyces tardus was isolated from contaminated demineralized water. It differs from K. nectairii, the only other Kurtzmanomyces species so far described, in its carbon assimilation pattern and low DNA-DNA homology (2.3%±2.1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422729
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  • 6
    Electronic Resource
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    Sporobolomyces lactosus, a new species of ballistosporous yeast equipped with ubiquinone-10 (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 245-248 
    Details
    ISSN: 1572-9699
    Keywords: Sporobolomyces lactosus ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species of ballistospore-forming yeasts was recovered and its description given.Sporobolomyces lactosus, isolated from activated sludge treating petrochemical wastes, produces pinkish-coral to pink colored colonies, assimilates lactose and has Q-10 as the major ubiquinone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584231
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  • 7
    Electronic Resource
    Electronic Resource
    Contributions to a revision of the genusTrichosporon (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 289-316 
    Details
    ISSN: 1572-9699
    Keywords: Trichosporon ; white piedra ; systemic mycosis ; taxonomy ; nDNA ; rRNA ; ubiquinone systems ; basidiomycetous yeasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genusTrichosporon was revised using characters of morphology, ultrastructure, physiology, ubiquinone systems, mol% G+C of DNA, DNA/DNA reassociations and 26S ribosomal RNA partial sequences. A total of 101 strains was used, including all available type and authentic cultures of previously described taxa. Nineteen taxa could be distinguished, 15 of which having Q-9 coenzyme systems and 4 having Q-10. Sixteen previously described names were reduced to synonymy. One new species was described. The genus is characterized by the presence of arthroconidia. Few species possess further diagnostic morphological characters, such as the presence of appressoria, macroconidia or meristematic conidiation. The septa of two species were found to be non-perforate, while those of the remaining species contained dolipores at variable degrees of differentiation, with or without vesicular or tubular parenthesomes. All species were able to assimilate a large number of carbon compounds; visible CO2 production was absent. The genus was found to be fairly homogeneous on the basis of a phylogenetic analysis of partial 26S rRNA sequences, with the exception ofT. pullulans which proved to be unrelated. Most taxa were found to occupy well-defined ecological niches. Within the group of taxa isolated from humans, a distinction found be made between those involved in systemic mycoses and those which mainly caused public or non-public white piedras, respectively. One species was consistently associated with animals, while others came mainly from soil or water. One species was mesophilic and another psychrophilic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713938
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  • 8
    Electronic Resource
    Electronic Resource
    Seasonal changes of microbial populations in the sediments of the basins of Lugano and Agno (1992)
    Springer
    Aquatic sciences 54 (1992), S. 331-337 
    Details
    ISSN: 1420-9055
    Keywords: Heterotrophic bacteria ; sediments ; taxonomy ; seasonal variations ; aerobic bacterial population ; anaerobic bacterial population ; Lake Lugano (Lago di Lugano)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This research was carried out with the aim to explore the heterotrophic microbial population of two sediments in different oxic conditions of the Lake of Lugano (Lago di Lugano). The values of the viable bacterial counts found in our sediment samples were typical for an eutrophic lake. The increase in the proportion of anaerobic to aerobic bacteria at 30 °C observed in the sediment samples of Agno may reflect the depletion of oxygen concentrations in the water column. The generaAeromonas, Pseudomonas, Bacillus andClostridium, as well as strains belonging to the Coryneform-group, represented the major taxonomic groups of heterotrophic bacterial communities in the water-sediment interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878145
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  • 9
    Electronic Resource
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    The genusBlepharispermum (Asteraceae, Heliantheae) (1992)
    Springer
    Plant systematics and evolution 182 (1992), S. 149-227 
    Details
    ISSN: 1615-6110
    Keywords: Asteraceae ; Heliantheae ; Blepharispermum ; Revision ; taxonomy ; phylogeny ; cladistics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The palaeotropic genusBlepharispermum (Asteraceae, Heliantheae) is revised for the first time. Fifteen species from Africa, the Arabian Peninsula, Madagascar, India, and Ceylon are recognized. Two new species are described, viz.B. arcuatum andB. canescens. Aspects of the systematic position and morphology of the genus are discussed. A hypothesis of phylogenetic relationships is presented by way of a cladistic analysis. A key to all species in the genus as well as typification, descriptions, drawings and distribution maps are supplied. Chromosome counts of two species are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939188
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  • 10
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    The delimitation and taxonomic position of the tropical African generaLeptactina andDictyandra (Rubiaceae) (1984)
    Springer
    Plant systematics and evolution 145 (1984), S. 105-118 
    Details
    ISSN: 1615-6110
    Keywords: Rubiaceae ; Coffeeae ; Gardenieae ; Pavetteae ; Dictyandra ; Leptactina ; Tarenna ; Pavetta ; Dictyandra congolana sp. nova ; taxonomy ; morphology ; seed-coat ; palynology ; Flora of tropical Africa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The closely related African generaDictyandra andLeptactina are redelimited. The two genera are distinguished by long tubular corolla-tubes with included anthers (Leptactina) vs. much shorter tubes with exserted anthers (Dictyandra), rather than—as previously thought—presence or absence of multilocellate anthers. The discovery of a new species (Dictyandra congolana from the Congo and W-Zaire) confirms this. It can be concluded, especially from comparative morphological studies of fruits and seeds, thatDictyandra andLeptactina are related toPavetta, Tarenna, Ixora, etc., i.e. the group of genera in theCoffeeae s.l. with terminal inflorescences. It is proposed that the tribePavetteae be revived to accomodate those genera.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984034
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  • 11
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    An ultrastructural comparison betweenSpermatozopsis andDunaliella (Chlorophyceae) (1984)
    Springer
    Plant systematics and evolution 146 (1984), S. 31-46 
    Details
    ISSN: 1615-6110
    Keywords: Chlorophyceae ; Spermatozopsis ; Dunaliella ; D. salina ; Green flagellates ; ultrastructure ; taxonomy ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ultrastructure of the type species of the genusDunaliella, D. salina, has been reinvestigated in an attempt to clarify the relationships betweenDunaliella andSpermatozopsis. Dunaliella salina differs in the following ultrastructural characters fromSpermatozopsis (as exemplified byS. similis Preisig etMelkonian): presence of a distinctive surface coat covering the plasmalemma; presence of a prominent pyrenoid (with pairs of thylakoids partially entering the pyrenoid matrix); dictyosomes parabasal; endoplasmic reticulum closely underlying the plasmalemma around most of the cell; contractile vacuoles absent; cell form ovoid to elongated and not spirally twisted; mitochondrial profiles near the flagellar apparatus. Differences in the ultrastructure of the flagellar apparatus: basal body angle more or less fixed; distal connecting fibre cross-striated; system II fibre (rhizoplast) present, associated with mitochondrial profile; system I fibre underlying two-stranded microtubular root; mating structure present. These ultrastructural differences justify distinction between the two taxa at generic level. The problematical status of “freshwater” species ofDunaliella is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984052
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  • 12
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    A light and electron microscopical study of the green flagellateSpermatozopsis similis spec. nova (1984)
    Springer
    Plant systematics and evolution 146 (1984), S. 57-74 
    Details
    ISSN: 1615-6110
    Keywords: Chlorophyceae ; Spermatozopsis similis ; Green flagellate ; new species ; algal culture ; electron microscopy ; taxonomy ; phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The green flagellateSpermatozopsis similis spec. nova has been studied in culture by light and electron microscopy. The flagellate bears two flagella, is naked and has a characteristic crescent and spirally twisted cell shape. The two flagella are of subequal length, each with a prominent hair-point. Each cell contains two contractile vacuoles, a single chloroplast with an anterior eyespot but lacking a pyrenoid, an anteriorly located nucleus, a single dictyosome associated with the posterior end of the nucleus, a single mitochondrion posterior to the nucleus and associated with a small microbody, some conspicuous vacuoles, and a greater number of secondary cytoskeletal microtubules which probably are responsible for maintaining the peculiar shape of this species. SinceS. similis in culture is only biflagellate, it cannot be accommodated within the quadriflagellate, but otherwise very similar speciesS. exsultans. Spermatozopsis similis is compared with other green flagellates and is shown to share common ultrastructural characters withChlamydomonas-type green algae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984054
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  • 13
    Electronic Resource
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    Spiniferomonas septispina andS. enigmata, two new algal species confusing the distinction betweenSpiniferomonas andChrysosphaerella (Chrysophyceae) (1984)
    Springer
    Plant systematics and evolution 148 (1984), S. 103-117 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Chrysophyceae ; Spiniferomonas septispina sp. n. ; S. enigmata sp. n. ; Chrysosphaerella ; Morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two new species of non-colonial silica-scaled chrysophytes were discovered in Ontario and were assigned to the genusSpiniferomonas (Chrysophyceae) owing to their solitary cell habit. Scale structure in the two new species is distinctive but includes features common to bothSpiniferomonas andChrysosphaerella. The use of scale structure as the main diagnostic feature to distinguish the two genera is no longer acceptable. A more expedient separation of the two genera based on cell habit (solitary vs. colonial) is proposed and includes the transfer ofChrysospharella salina Birch-Andersen andChrysosphaerella coronacircumspina Wujek & Kristiansen to the genusSpiniferomonas as new combinations. The proposed revision is consistent with existing generic circumscriptions of other ochromonadalean forms with either solitary or colonial cell habit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984572
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  • 14
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    Über einen intrazellulären Parasiten beiCryptomonas (Cryptophyceae), II. (1984)
    Springer
    Plant systematics and evolution 148 (1984), S. 165-167 
    Details
    ISSN: 1615-6110
    Keywords: Cryptophyceae ; Bodonaceae ; Proteromonas steinii sp. n. ; Cryptomonas spp. div. ; Intracellular parasite ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new intracellular parasite inCryptomonas spp. div. previously known is described asProteromonas steinii spec. nova. The flagellate (infectious) stage isBodo-like, with a distinct kinetoplast. The immobile parasitic stage occurs in the cells of Cryptomonads as a multinucleate trophocyst with a thin mucilage envelope (pseudocyst), while the hypnocyst is uninucleate, walled and bearing two horned projections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984576
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  • 15
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    Genomic groups, morphology, and sectional delimitation in EurasianElymus (Poaceae, Triticeae) (1992)
    Springer
    Plant systematics and evolution 180 (1992), S. 1-13 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Elymus ; Genome analysis ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seven tetraploid species ofElymus, viz.E. sibiricus, E. caninus, E. gmelinii, E. semicostatus, E. caucasicus, E. parviglume, andE. longearistatus subsp.canaliculatus, representing five sections were studied morphologically and used in interspecific hybridizations. The aim was to investigate whether the present sectional delimitation of the genus was in agreement with genomic data and if there was a correlation between genome constitution and morphology. The study revealed: (i) further information on the genomic affinities between the different species, (ii) that there is no congruence between genome constitution of the species and current sectional delimitation, and (iii) that there is a correlation between genome constitution and morphology in the palea apex shape and in the size of cilia of the palea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940394
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  • 16
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    Ruellia sect.Urceolata (Acanthaceae), a novel species complex from southern Mexico (1992)
    Springer
    Plant systematics and evolution 180 (1992), S. 221-225 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Acanthaceae ; Ruellia ; Speciation over short distances ; endemism ; taxonomy ; Flora of Mexico
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new section in MexicanRuellia, R. sect.Urceolata comprising three species (includingR. cedilloi, spec. nova), endemic to Mexico, is described and illustrated. The taxonomic relationship and differentiation of the species are discussed. Evolution in Mexican Ruellas seems to be occurring at the diploid level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00941152
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  • 17
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    Hybrid speciation and radiation in the neotropical woody genusTocoyena (Rubiaceae) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 143-169 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rubiaceae ; Tocoyena ; Hybridization ; differentiation ; speciation ; homogamic complex ; tropical woody plants ; taxonomy ; Flora of South America
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The variation pattern of a large population ofTocoyena formosa in Botucatu, state of São Paulo, Brazil, and of other samples throughout the species area was analysed by morphometrical, statistical, ecological, and phytogeographical methods. Excessive variation and the remarkable coherence of two different character syndromes within this species strongly suggest that it has originated as a homogamic (diploid) hybrid complex. Possible parental species areT. brasiliensis, mainly from the Amazon region, andT. viscidula from the dry caatinga region of NE. Brazil.T. formosa has a much more extensive geographical range and greater ecological plasticity, ranging from the Amazon basin and the Guyanas throughout the Central Brazilian Plateau and from NE. to S. Brazil and Paraguay. Three (partly sympatric) varieties are distinguished withinT. formosa, i.e. var.formosa, var.pseudobrasiliensis (var. nov.), and var.microdon (comb. et stat. nov.). A provisional taxonomic revision, key, and conspectus covers the 12 accepted species ofTocoyena with blunt flower buds and ovate obtuse corolla lobes (group A, includingT. formosa); their distribution is shown in a map.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937441
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  • 18
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    Two new species of the diatom genusChaetoceros (Bacillariophyta) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 217-226 
    Details
    ISSN: 1615-6110
    Keywords: Diatoms ; plankton ; Chaetoceros ; New species ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two new planktonic diatom species of the genusChaetoceros are described herein:Ch. octagonus andCh. rectus, from material of Baja California coasts and the Gulf of California, respectively;Ch. rectus was also found in a sample from Australian waters.Ch. octagonus is a robust species, with a characteristic pyramidal valve shape, heavily silicified valves and setae, and one central rimoportula on every valve in the chain; it is compared with related species, which show a similar morphology, especially by electron microscopy. It belongs into subg.Chaetoceros, sect.Borealia. Ch. rectus is placed in subg.Hyalochaete, and provisionally within sect.Anastomosantia. Its major characters are: chains, cells, and setae are delicate and fragile, cells are joined in the chain by a “bridge” which connects sibling intercalary setae, valves and setae are weakly silicified, and one rimoportula is present on terminal valves only. Comparison is made with another species of the same section.Ch. rectus shows a different manner of chain-forming within the genus than previously described in the literature.
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    URL: http://dx.doi.org/10.1007/BF00937445
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  • 19
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    A new combination and a new species in the lichen genusCatapyrenium (lichenizedAscomycetes, Verrucariaceae) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 255-260 
    Details
    ISSN: 1615-6110
    Keywords: Pyrenocarpous lichens ; Verrucariaceae ; Dermatocarpon ; Catapyrenium ; Catapyrenium velebiticum comb. nov. ; Catapyrenium pyrenaicum spec. nova ; Systematics ; taxonomy ; Flora of Austria, Croatia, France, Spain, and Switzerland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Catapyrenium pyrenaicum is described as new from northern Spain and adjacent France, and the new combinationCatapyrenium velebiticum is made. The new species differs fromC. velebiticum mainly in its laminal pycnidia. Remarks on taxonomy, ecology, and distribution of the species are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937449
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  • 20
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    Descriptions of the larvae of four nearctic species ofEpoicocladius (Diptera: Chironomidae) with a redescription ofEpoicocladius ephemerae (Kieffer) (1992)
    Springer
    Aquatic ecology 26 (1992), S. 145-155 
    Details
    ISSN: 1573-5125
    Keywords: Chironomidae ; Epoicocladius ; symbiosis ; taxonomy ; Ephemeridae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The larvae of four species ofEpoicocladius from eastern North America are described along with a redescription of the European species,Epoicocladius ephemerae (Kieffer). A key to known 4th instar Nearctic and western PalaearcticEpoicocladius larvae is presented. Previous species descriptions and records of NearcticEpoicocladius spp. are discussed in reference to the larvae described here. Larvae ofEpoicocladius ephemerae (Kieff.), a species described from Europe which is currently synonymized with the NearcticE. flavens, have yet to be collected in North America. This suggests that the synonymy is invalid andE. ephemerae should be considered a legitimate species. A likely candidate to be the larva ofEpoicocladius flavens (Malloch) is suggested. However, until reared adults are obtained, the larva ofE. flavens remains unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02255235
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  • 21
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    The larva and habitat ofParakiefferiella nigra Brundin (Diptera: Chironomidae) (1992)
    Springer
    Aquatic ecology 26 (1992), S. 527-531 
    Details
    ISSN: 1573-5125
    Keywords: palaeolimnology ; Chironomidae ; taxonomy ; larval subfossils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Collections of adults ofParakiefferiella nigra Brundin indicate that this chironomid occurs widely in arctic and subarctic zones. In addition, it has occasionally been collected in cool temperate and boreal forest lakes of both North America and Europe. Although widely distributed, the larva and its habitat have not previously been described. Identity of the larva ofP. nigra has been established by studying associated reared specimens. The distinctive larva, with reduced second lateral mental teeth, is stenotopic, and on the basis of modern collections appears to be most abundant in cold, oligotrophic lakes. More data is required to establish the range of thermal environments inhabited by the larva. Larval head capsule remains ofP. nigra are common in late-glacial sediments of southwestern British Columbia lakes and provide important evidence for oligotrophic conditions during late-glacial time.
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    URL: http://dx.doi.org/10.1007/BF02255286
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  • 22
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    A critical comparison ofGracilaria chilensis andG. sordida (Rhodophyta, Gracilariales) (1990)
    Springer
    Journal of applied phycology 2 (1990), S. 375-382 
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    ISSN: 1573-5176
    Keywords: Gracilaria ; taxonomy ; organellar DNA restriction ; anatomy ; chromosome number ; interfertility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gracilaria chilensis Bird, McLachlanet Oliveira from Chile andG. sordida Nelson from New Zealand have been compared with respect to reproductive anatomy, chromosome number, interfertility, and organellar DNA restriction profiles. No differences were found in reproductive anatomy, which in these species is distinguished by deeptextorii-type spermatangial conceptacles and prominent tubular nutritive cells directed only to the floor of the cystocarp. The species share a chromosome number ofn = 24 and are readily interfertile. Electrophoretic profiles of organellar DNA digested with four different restriction endonucleases were virtually identical between the species except for bands that represented accompanying plasmids. However, previous research has indicated that the four plasmid bands inG. chilensis and the single one inG. sordida have a common origin. On these groundsG. chilensis andG. sordida are
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    Phylogenetic definitions and taxonomic philosophy (1992)
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    Biology and philosophy 7 (1992), S. 295-313 
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    ISSN: 1572-8404
    Keywords: Clade ; class ; composite whole ; definition ; defining property ; essentialism ; evolution ; individual ; intension ; name ; ostensive definition ; phylogeny ; population ; set ; species ; taxon ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Philosophy
    Notes: Abstract An examination of the post-Darwinian history of biological taxonomy reveals an implicit assumption that the definitions of taxon names consist of lists of organismal traits. That assumption represents a failure to grant the concept of evolution a central role in taxonomy, and it causes conflicts between traditional methods of defining taxon names and evolutionary concepts of taxa. Phylogenetic definitions of taxon names (de Queiroz and Gauthier 1990) grant the concept of common ancestry a central role in the definitions of taxon names and thus constitute an important step in the development of phylogenetic taxonomy. By treating phylogenetic relationships rather than organismal traits as necessary and sufficient properties, phylogenetic definitions remove conflicts between the definitions of taxon names and evolutionary concepts of taxa. The general method of definition represented by phylogenetic definitions of clade names can be applied to the names of other kinds of composite wholes, including populations and biological species. That the names of individuals (composite wholes) can be defined in terms of necessary and sufficient properties provides the foundation for a synthesis of seemingly incompatible positions held by contemporary individualists and essentialists concerning the nature of taxa and the definitions of taxon names.
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    Polypedilum digitifer Townes andPolypedilum griseopunctatum (Malloch) (Diptera, Chironomidae): Redescription of adult males with a description and separation of the immature stages (1992)
    Springer
    Aquatic ecology 26 (1992), S. 203-213 
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    ISSN: 1573-5125
    Keywords: aquatic insects ; midges ; chironomidae ; taxonomy ; Diptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polypedilum (Tripodura) digitifer Townes andPolypedilum (Tripodura) griseopunctatum (Malloch) are morphologically similar species of Chironomidae. Using associated material from New York State, the adult males for both species are redescribed (adding previously ignored characters) and the mature larva and pupa are thoroughly described for the first time. Traits for distinguishing these species from each other and possibly from other Nearctic species ofPolypedilum (Tripodura) are provided.
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    Corrections to the Chironomidae part of the Catalogue of Palaearctic Diptera (1992)
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    Aquatic ecology 26 (1992), S. 215-221 
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    ISSN: 1573-5125
    Keywords: taxonomy ; palaearctic Chironomidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An extensive list of corrections to the Chironomidae part of the ‘Catalogue of Palaearctic Diptera’ (ASHE and CRANSTON, 1990) is given.
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    Systematics ofJusticia sect.Pentaloba (Acanthaceae) (1990)
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    Plant systematics and evolution 169 (1990), S. 219-235 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Acanthaceae ; Justicia ; Siphonoglossa ; Cytology ; flavonoids ; systematics ; taxonomy ; generic relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The transfer of the four taxa ofSiphonoglossa sect.Pentaloba toJusticia is proposed. It is shown that the taxa of this section were placed inSiphonoglossa primarily because of a single-character phenetic relationship and that they correctly belong inJusticia. In addition to morphology, data from cytology and flavonoid chemistry are also presented that support this intergeneric transfer. A key to the taxa and a detailed taxonomic treatment of the section are provided.
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    Cytogenetic investigations onOenothera nutans (Onagraceae) (1990)
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    Plant systematics and evolution 169 (1990), S. 69-80 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Onagraceae ; Oenothera sect.Oenothera subsect.Oenothera ; O. nutans ; Chromosomal analysis ; complex analysis ; structural heterozygosity ; complex heterozygosity ; taxonomy ; numerical taxonomy ; factor analysis ; reciprocal translocations ; Sifactors ; lethal factors ; sublethal factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oenothera nutans, common to the Appalachian Mts between 650 and 1 700 m altitude, was investigated cytogenetically and taxonomically. The species is permanently structurally heterozygous. It consists of two genomes of the B-type which are more or less indistinguishable phenotypically. Nearly all of the strains investigated possess a self-incompatibility factor in one of the two complexes. Both complexes show a close relationship to the predominantly homozygousO. grandiflora, a native of the southern lowlands.O. nutans andO. grandiflora possess the same plastid type, plastome III. Probably,O. nutans evolved by an accumulation of reciprocal translocations within an originally structurally homozygous population, which must be regarded ancestral to the present forms ofO. grandiflora.
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    Karyological studies inPelargonium sectt.Ciconium, Dibrachya, andJenkinsonia (Geraniaceae) (1990)
    Springer
    Plant systematics and evolution 170 (1990), S. 151-159 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Geraniaceae ; Pelargonium ; Chromosome numbers ; karyotypes ; karyotype evolution ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pelargonium sect.Ciconium and sect.Dibrachya have a basic chromosome number of x = 9, whereas sect.Jenkinsonia has x = 9, 11, and 17.
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    Ribosomal RNA genes inQuercus spp. (Fagaceae) (1990)
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    Plant systematics and evolution 172 (1990), S. 127-139 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Fagaceae ; Quercus ; Gene mapping ; ribosomal RNA genes ; rRNA/DNA hybridization ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The taxonomy of the genusQuercus is still unclear. In order to elucidate the taxonomy of Mediterranean oaks we have analyzed ribosomal RNA genes ofQuercus cerris, Q. coccifera, Q. trojana, Q. ilex, Q. suber, andQ. macrolepis by means of Southern blot hybridization. Oak nuclear DNA was extracted from root tips of 300 acorns and from catkins of single plants. EcoRI and BamHI restriction endonucleases were used. DNA electrophoresis and rRNA/DNA hybridization were performed usingVicia faba rRNA 18 S and 25 S as probes. The rRNA genes of all the species studied have an identical restriction mapping in the 18 S and 25 S regions, while differences in length are present in the intergenic regions.Q. cerris possesses at least four types of genes of 12.1, 11.5, 8.5, and 8.3 kb;Q. coccifera at least three types of 12.4, 10.4, and 10.1 kb;Q. trojana possesses the same rRNA genes asQ. cerris plus another gene type 12.0 kb long, with EcoRI and BamHI restriction sites in the intergenic spacer;Q. ilex at least three types of 12.4, 10.85, and 9.5 kb;Q. suber at least five types of 11.5, 11.0, 8.6, 8.5, and 8.3 kb;Q. macrolepis, finally, at least seven types of 11.5, 11.0, 10.2, 8.6, 8.5, 8.3, and 8.15 kb.Q. coccifera andQ. ilex rDNA appears quite different respect to other species examined, while high similarity seems to exist betweenQ. cerris, Q. trojana, Q. suber, andQ. macrolepis. These results are in agreement with the taxonomic model proposed bySchwarz for the genusQuercus.
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    Morphological and anatomical differentiation ofVellozia hirsuta populations (Velloziaceae) (1990)
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    Plant systematics and evolution 173 (1990), S. 197-208 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Velloziaceae ; Vellozia hirsuta ; Morphological and anatomical variation ; geographical differentiation ; taxonomy ; Flora of the campos rupestres ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The morphological and leaf anatomical differentiation ofVellozia hirsuta is analysed and classified into several types (A1, A2, A4, B3, B5, C3). The species has a relatively wide distribution in the campos rupestres of Minas Gerais in Brazil. The variation of the isolated populations on different mountain ranges is complex, does not follow a clear geographical pattern, and defies taxonomic classification.
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    Nothobartsia, a new genus ofScrophulariaceae from southwest Europe (1992)
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    Plant systematics and evolution 179 (1992), S. 59-71 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Scrophulariaceae ; Rhinanthoideae ; Rhinantheae—Euphrasinae ; Nothobartsia aspera ; N. spicata ; Bartsia ; Odontites ; Euphrasia ; Cladistics ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Recent systematic studies ofBartsia andOdontites showed the necessity to exclude the closely related perennial speciesBartsia aspera (Portugal and northern Morocco) andBartsia spicata (Central Pyrenees) from the genusBartsia as a segregate genus namedNothobartsia. Morphologically this new genus combines characteristic features ofBartsia and ofOdontites. Its autonomous systematic position is supported by the cladistic analysis, showing thatNothobartsia represents a relatively primitive genus standing close to the common ancestral root ofBartsia, Euphrasia, andOdontites.
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    A reappraisal ofPelargonium sect.Ligularia (Geraniaceae) (1992)
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    Plant systematics and evolution 179 (1992), S. 257-276 
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    ISSN: 1615-6110
    Keywords: Angiosperms ; Geraniaceae ; Pelargonium ; Chromosome numbers ; karyotypes ; hybridization ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A study of 33 species ofPelargonium sect.Ligularia reveals four basic chromosome numbers, x = 8, 9, 10, and 11, and variation in chromosome size. From evidence of karyology and hybridization attempts, proposals are made to divide the section into smaller groups and to transfer some species to other sections.
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    Identification of Vigna spp. through specific seed storage polypeptides (1992)
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    Euphytica 62 (1992), S. 39-43 
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    ISSN: 1573-5060
    Keywords: Vigna spp. ; identification ; specific bands ; globulins ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Seed globulins of ten Vigna species were separated by means of SDS electrophoresis. Both inter and intraspecific variation were observed. Groups of specific bands which do not vary in the species being present in all the accessions of the species were identified. These species-specific bands, allow the identification of the 10 Vigna spp. analyzed.
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    Taxonomy of Mexican landraces of maize, Zea mays, based on their resistance to European corn borer, Ostrinia nubilalis (1990)
    Springer
    Euphytica 46 (1990), S. 119-131 
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    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; Ostrinia nubilalis ; European corn borer ; resistance ; taxonomy ; germplasm ; indigenous land races
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The resistance to the European corn borer, Ostrinia nubilalis (Hubner), of thirty-seven indigenous landraces of Mexican maize was examined. The relationship of resistance and existing taxonomy of maize according to Wellhausen et al., (1952), was subjected to numerical analyses. Variables examined were: seedling DIM-BOA content, the extent of leaf feeding damage by early instar larvae both in the field and in the laboratory, the extent of plant breakage and stalk tunneling by late instar larvae, plant height, and the extent of fungal damage by Gibberella zeae and Ustilago maydis. Significant differences in resistance among the major taxonomic groupings were reflected in the existing taxonomy of maize (Wellhausen et al., 1952). The most resistant landrace grouping was Wellhausen et al.'s Prehistoric Mestizos. Eighty-five percent of a series of modern inbred lines, pools, and Argentine landraces were found to have affinities with one of the more susceptible groupings, the Ancient Indigenous Races, based upon analysis of the resistance data.
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    The rotifer fauna and population dynamics of Lake Studer 2 (Kerguelen Archipelago) with description ofFilinia terminalis kergueleniensis n. ssp. and a new record ofKeratella sancta Russel 1944 (1984)
    Springer
    Hydrobiologia 108 (1984), S. 57-64 
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    ISSN: 1573-5117
    Keywords: rotifers ; taxonomy ; population dynamics ; biomass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Filinia terminalis kergueleniensis nov. spp. (FamilyFiliniidae Bartos 1959), from Lake Studer 2 is described and figured.Filinia terminalis kergueleniensis differs from the type in length of bristles and their insertion.Keratella sancta was found again; it is the third record after its discovery by Russel 1944 in New Zealand.Notholca cf.jugosa Gosse 1889 is also found in the plankton of the subantarctic lake. The new subspecies andKeratella sancta occur all year round, whileNotholca cf.jugosa is sporadic. Population dynamics appear to be dependent on changes in temperature and chlorophyll content. We have estimated the relative contribution of these three species to community biomass from their numerical abundance and measured volumes. The major community biomass peak lasts from March to June with a secondary maximum between October and January.
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    Two new and three redescribed species of Viscosia (Nematoda, Oncholaimidae) (1984)
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    Hydrobiologia 114 (1984), S. 123-147 
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    ISSN: 1573-5117
    Keywords: Nematodes ; freeliving ; marine ; brackish ; taxonomy ; new species ; Viscosia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Viscosia coomansi sp. nov. and Viscosia heterolaina sp. nov. are described from Lake Grevelingen and Eastern Scheldt (The Netherlands). Viscosia glabra (Bastian, 1865) de Man 1890, Viscosia franzii Boucher 1977, and Viscosia viscosa (Bastian 1865) de Man 1890 are redescribed, taking into account new important characters. Juvenile specimens are depicted for V. viscosa. Viscosia carnleyensis Ditlevsen, 1921 is synonymized with Viscosia glabra (Bastian, 1865). Mononcholaimus viscosus Allgén, 1930 and Mononcholaimus elegans sensu Schuurmans-Stekhoven, 1942, 1950 (nec. Kreis, 1924) are synonymized with Viscosia viscosa (Bastian, 1865).
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    The undescribed female of Pseudostenhelia secunda Wells, 1971 (Copepoda Harpacticoida) and keys to the genus (1984)
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    Hydrobiologia 114 (1984), S. 149-156 
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    ISSN: 1573-5117
    Keywords: female ; Pseudostenhelia secunda ; Copepoda ; Harpacticoida ; taxonomy ; identification keys ; India
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The hitherto unknown female of Pseudostenhelia secunda Wells, 1971 collected from Lake Kolleru, India, is described and illustrated. It can be readily diagnosed inter alia by the abdominal ornamentation, and by the setation of legs 2–4. The original description of the male of this species is supplemented. Further, keys are furnished for identifying both sexes of the three known species of the genus Pseudostenhelia Wells.
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    Some problems in the taxonomy of Chinese species of Gracilaria (Rhodophyta) (1984)
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    Hydrobiologia 116-117 (1984), S. 59-62 
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    ISSN: 1573-5117
    Keywords: seaweed ; Gracilaria ; taxonomy ; systematics ; marine algae ; morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    Developmental studies on cultured endolithic conchocelis (Rhodophyta) (1984)
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    Hydrobiologia 116-117 (1984), S. 201-208 
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    ISSN: 1573-5117
    Keywords: seaweed ; conchocelis ; endolith ; Rhodophyta ; culture ; development ; taxonomy ; morphology ; influence of substrate mineralogy ; morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    A new aspect of Ulva vegetation along the Japanese coast (1984)
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    Hydrobiologia 116-117 (1984), S. 229-232 
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    ISSN: 1573-5117
    Keywords: seaweed ; Ulva ; taxonomy ; phenology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    Moina weismanni Ishikawa, 1896 (Cladocera, Moinidae) in Central Europe (1990)
    Springer
    Hydrobiologia 190 (1990), S. 33-42 
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    ISSN: 1573-5117
    Keywords: Crustacea ; Cladocera ; Moinidae ; M. weismanni ; taxonomy ; Central Europe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Moina weismanni Ishikawa is reported from Czechoslovakia, Hungary, and Yugoslavia. The species was formerly synonymized with Moina micrura Kurz, based on parthenogenotic females. In both species, parthenogenetic females have a characteristic postabdomen, antennules (characters formerly regarded as typical for a variety of M. micrura), and ephippium. Wales are quite different. Examined populations of both species are similar in length-to-width ratio. M. weismanni is typical for small, eutrophic but permanent, and for large temporary water bodies. M. micrura is restricted to the plankton.
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    Daphnia (Ctenodaphnia) hispanica sp. nov., a new daphnid (Cladocera) from Spain (1990)
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    Hydrobiologia 194 (1990), S. 149-162 
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    ISSN: 1573-5117
    Keywords: Daphnia (Ctenodaphnia) ; hispanica ; morphology ; taxonomy ; ecology ; Spain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Daphnia (C.) hispanica n. sp. has thoracic limbs of A ‘D. (C.) atkinsoni type’ and is very similar toD. chevreuxi Richard, 1896. With this speciesD. (C.) hispanica shares the presence of a soft accessory seta on the outer side of the trunk of the first thoracic limb, apparently unique among the genusDaphnia. Although other morphological characteristics are very similar in this two species, a detailed comparison reveals that they can easily be separated as different species. The most useful features in differentiating both species are:D. (C.) hispanica has a dorsal crest in the head, its rostrum is longer, its accesory seta of the first thoracic limb is more developed, the juveniles are not helmeted and its male postabdomen lacks individual denticles on the anal and preanal margin. The new species is, up to now, restricted to Spain and inhabits the temporary and low mineralized waters of the steppe regions.
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    A new species of Ilyocryptus (Anomopoda: Macrothricidae) from Argentina (1992)
    Springer
    Hydrobiologia 231 (1992), S. 141-151 
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    ISSN: 1573-5117
    Keywords: Cladocera ; Anomopoda ; new species ; taxonomy ; Neotropis ; Argentina
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract I. elegans n.sp. from the Parana River, northeastern Argentina is proposed and its morphological features are compared with those of the apparently related I. agilis. Its outstanding characteristics are the long 2rd to 5th setae of ventral margin of the valves, the rudimentary nature of defensive setae, the low number of spines in the preanal lobe of postabdomen and the unequality of the length of the setae in the outer distal lobe of first trunk limbs. Finding of this new species suggests that I. agilis would be a complex of species and its records should be revised.
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    Alona sketi sp.n. (Cladocera:Chydoridae), the second cave-inhabiting Cladoceran from former Yugoslavia (1992)
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    Hydrobiologia 248 (1992), S. 105-114 
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    ISSN: 1573-5117
    Keywords: Cladocera ; Chydoridae ; taxonomy ; hypogean waters ; Yugoslavia ; Slovenia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Alona sketi sp.n. is the second blind cave-dwelling cladoceran from Yugoslavia. It has been found only in some lakelets in a cave in the SW Slovenia (Yugoslavia). The new taxon is related to A. hercegovinae Brancelj, 1990 from Hercegovina, but both differ markedly. The stygobiotic nature of the new taxon is supported by a reduced and depigmented eye apparatus, no signs of malnutrition in a habitat poor in organic material, trunk limbs with modified setae and scrapers to increase ability for food gathering, and an exclusively stygobiotic accompanying fauna.
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    Encentrum (Parencentrum) walterkostei n. sp., a new dicranophorid rotifer (Rotatoria: Monogononta) from the high alpine zone of the Central Alps (Austria) (1990)
    Springer
    Hydrobiologia 281 (1990), S. 51-56 
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    ISSN: 1573-5117
    Keywords: Encentrum ; Dicranophoridae ; alpine rotifers ; psammon ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new dicranophorid rotifer, Encentrum (Parencentrum) walterkostei n.sp., is described from an oligotrophic alpine lake. The species was abundant in the psammolittoral of the ‘Unterer Schwarzhornsee’, 2543 m above sea level. The main distinguishing taxonomic features of the new species are long, swordshaped toes and only four vitellary nuclei. Its known occurrence in the sandy substrate of only one lake suggests a stenobiontic nature of this apparently oligothermic new species. Taxonomic problems associated with the Encentrum/Dicranophorus group are briefly discussed.
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    Four new species of Halicyclops Norman, 1903 (Copepoda, Cyclopoida) from Brazil (1984)
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    Hydrobiologia 119 (1984), S. 107-117 
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    ISSN: 1573-5117
    Keywords: taxonomy ; estuarine crustaceans ; Copepoda ; Halicyclops ; Neotropical Region ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four new species of Halicyclops are described and figured from plankton samples of the brackish waters of Pomonga River, Sergipe State (NE Brazil). The ornamentation of the median apical setae of the furcal rami is proposed as useful diagnostic character for species distinction.
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    Desmoscolecids (Nematode) from New Georgia, Solomon Islands (1984)
    Springer
    Hydrobiologia 119 (1984), S. 181-191 
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    ISSN: 1573-5117
    Keywords: Desmoscolecida ; Desmoscolex ; Nematoda ; Solomon Islands ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two new desmoscolecid species are described: Desmoscolex koloensis sp. nov. and D. parakoloensis sp. nov. Additional information is given on Desmoscolex (Desmolorenzenia) montana, D. sieverti and D. fennicus. The genus Desmolorenzenia is considered a subgenus of Desmoscolex. Pareudesmoscolex lacustris represents a juvenile state of Desmocolex dussarti. Some reflections are made on terrestrial and freshwater desmoscolecids.
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    Taxonomy of Gracilaria: Evaluation of some aspects of reproductive structure (1984)
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    Hydrobiologia 116-117 (1984), S. 41-46 
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    ISSN: 1573-5117
    Keywords: seaweed ; Gracilaria ; spermatangia ; gonimoblast ; tetrasporangia ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027636
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    Phylogenetic and taxonomic problems in freshwater Oligochaeta with special emphasis on chitinous structures in Tubificinae (1984)
    Springer
    Hydrobiologia 115 (1984), S. 19-23 
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    ISSN: 1573-5117
    Keywords: aquatic Oligochaeta ; Tubificinae ; phylogeny ; taxonomy ; chitinous penis sheaths
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Setae and chitinous penis sheaths are the main characters used to distinguish genera and species of the subfamily Tubificinae. Genital setae and penis sheaths are of functional importance to facilitate copulation. Similar structures in different genera may be homologous or products of parallel evolution (homoiologous). Form and dimensions of the penis sheaths of many tubificine species are very variable. Transspecific overlap of quantitative species characters can make the determination of specimens in the genus Limnodrilus difficult. The configuration of the distal ends of the penis sheaths is an important character to distinguish Limnodrilus species. The definition of the intraspecific variability of this morphological character is problematic.
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    Taxonomic features used in discriminating some central and eastern Pacific species of Gracilaria (1984)
    Springer
    Hydrobiologia 116-117 (1984), S. 47-50 
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    ISSN: 1573-5117
    Keywords: seaweed ; Gracilaria ; taxonomy ; marine algae ; red algae ; agarweeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    URL: http://dx.doi.org/10.1007/BF00027637
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    An evaluation of some vegetative features and some interesting problems in Japanese populations of Gracilaria (1984)
    Springer
    Hydrobiologia 116-117 (1984), S. 51-54 
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    ISSN: 1573-5117
    Keywords: seaweed ; Gracilaria ; taxonomy ; systematics ; red algae ; Japanese algae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    A Contribution to our knowledge of the Taxonomy of discoidal centric diatoms based upon observations of populations from the River Thames, England (1990)
    Springer
    Hydrobiologia 190 (1990), S. 15-32 
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    ISSN: 1573-5117
    Keywords: freshwater ; River Thames ; centric diatoms ; key ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Centric diatoms collected from the River Thames at Kingston have been separated into ‘types’ (N.B. this term has no nomenclatural or taxonomic implication in this context), the cleaned frustules of which are visibly different when examined by light microscopy. An attempt has been made to correlate observations obtained by light microscopy, stereoscan and transmission electron microscopy, and to make detailed comparisons with descriptions in the literature. Some of the ‘types’ can be referred to known species while others, especially those referable to the genus Stephanodiscus, are more debatable. It is concluded that the separation of discoidal celled centric diatoms into ‘types’ visibly different by light microscopy is a valid basis for the ecological investigation of these planktonic diatoms, even though some of these ‘types’ probably represent morphotypes rather than separate species. A key to the centric diatoms from the Thames is presented together with tabulated characteristics upon which the key is based.
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    A new species of hemibranchiate sphaeromatid isopod of the genus Paracilicaea from Pakistan with the study of developmental stages of the male (1990)
    Springer
    Hydrobiologia 199 (1990), S. 21-28 
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    ISSN: 1573-5117
    Keywords: Isopoda ; taxonomy ; new species ; intertical rocky habitat ; Pakistan Coast ; development of male ; dimorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species, Paracilicaea keijii, of hemibranchiate sphaeromatid isopod is described and illustrated from the rocky intertidal zone of Karachi Coast, Pakistan. Four developmental stages of male are described in detail with the help of illustrations. The relationship of P. keijii sp. nov. with two closely allied species and genus Paracilicaea Stebbing, 1910 with Cymodoce Leach, 1814 are discussed. Attention has also been paid to sexual dimorphism of the species.
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    Restriction enzyme analysis of variation and taxonomy in the kelp genus Laminaria (Laminariales, Phaeophyta) (1990)
    Springer
    Hydrobiologia 204-205 (1990), S. 105-110 
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    ISSN: 1573-5117
    Keywords: Laminaria ; molecular biology ; seaweed ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract High levels of phenotypic variation in kelp species necessitate the use of taxonomic markers that are independent of morphology. Restriction fragment length polymorphism (RFLP) analysis of nuclear DNA can provide such markers. In this paper we present the results of an RFLP analysis of cytoplasmic ribosomal DNA (rDNA) in three Laminaria species (L. agardhii, L. digitata, L. groenlandica). Comparison of the restriction maps of the nontranscribed spacer (NTS) in the rDNAs suggests that this method should be useful for the differentiation of these taxa. These results are discussed, as are the applications of RFLP mapping to the identification of field-collected, morphologically variable plants.
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    Taxonomy of phyllophoroid algae: the implications of life history (1990)
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    Hydrobiologia 204-205 (1990), S. 119-124 
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    ISSN: 1573-5117
    Keywords: Ahnfeltia ; Gymnogongrus ; life history ; Phyllophora ; Phyllophoraceae ; Rhodophyta ; seaweed ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Phyllophoraceae Rabenhorst (Gigartinales) is a family that shows a great diversity of life history patterns. The three largest phyllophoroid genera, Ahnfeltia, Gymnogongrus and Phyllophora, all commercial sources of phycocolloids, show the greatest range of life history. Information from life history studies has been of significance to classification of the Phyllophoraceae at the family, generic and specific levels. In the tetrasporophyte of Ahnfeltia plicata, previously known as Porphyrodiscus simulans, tetrasporangia are zonate and borne terminally in small superficial sori in contrast to the chains of cruciate tetrasporangia characteristic of the Phyllophoraceae. A study of reproduction and life history in the type species, A. plicata, from the Atlantic concluded that the unique carposporophyte development, in conjunction with the most primitive pit-plug structure known in the Florideophycidae, justified the proposal of a new family Ahnfeltiaceae Maggs et Pueschel in the Ahnfeltiales Maggs et Pueschel. Most Pacific species of Ahnfeltia are instead phyllophoracean and closely related to Gymnogongrus. Gymnogongrus griffithsiae, the type species, forms tetrasporoblasts whereas the majority form internal cystocarps and have heteromorphic life histories. Proposals to divide the genus by life history type require further detailed morphological and ontogenetic studies of G. griffithsiae. Phyllophora species exhibit at least three different types of life history, tetrasporoblastic, isomorphic and heteromorphic, and this genus could likewise be split along these lines. At the specific level, intraspecific life history variability appears to be related to morphological variation in some species of Gymnogongrus.
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    The unique headpore of Monospilus dispar (Cladocera, Chydoridae) is not lonesome: new record of minute lateral pores (1992)
    Springer
    Hydrobiologia 232 (1992), S. 145-148 
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    ISSN: 1573-5117
    Keywords: headshield ; phylogeny ; SEM ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The headshield of Monospilus dispar (Cladocera, Chydoridae, Aloninae) was characterized by the presence of a unique headpore. Scanning Electron Microscopy shows the occurrence of minute pores close to the main headpore. The intimate structure of the main headpore is formed by concentric lamellae. This new information leads to new considerations about phylogeny.
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    Differentiation of North American and European forms of Fredericella sultana (Blumenbach) (Ectoprocta: Phylactolaemata) (1992)
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    Hydrobiologia 237 (1992), S. 185-193 
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    ISSN: 1573-5117
    Keywords: Bryozoa ; Ectoprocta ; Phylactolaemata ; Fredericella ; taxonomy ; karyotype ; genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fredericella sultana (Blumenbach, 1779) has long been considered one of the few freshwater bryozoan species with a truly cosmopolitan distribution. However, chromosome spreads from European material show 2n = 16 compared to 2n = 14 in North American specimens. In laboratory rearing the two forms are morphologically indistinguishable except for the surface texture of their statoblasts. Smooth statoblasts of European colonies match early illustrations of the species, while the densely pitted statoblasts of the North American form resemble those of F. indica Annandale 1909. On the basis of these observations we tentatively designate the North American ‘F. sultana’ as F. indica. The only known American species with smooth statoblasts is F. australiensis Goddard 1909, in which the 2n = 16 karyotype is similar or identical to European F. sultana; however, despite this karyotypic similarity the two species retain their distinguishing morphology when reared together in the laboratory. Two enzymes from a single specimen of European F. sultana were electrophoretically distinct from the corresponding enzymes present in samples of both F. australiensis and North American ‘F. sultana’. Four phosphoglucose isomerase alleles were present in North American ‘F. aultana’ from four geographically separated collection sites, although only one genotype for this locus was observed in material from any one site. These genetic findings are consistent with a relatively short-range dispersal potential in this species as compared to Plumatella species.
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    Freshwater snails of East Caprivi and the lower Okavango River Basin in Namibia and Botswana (1992)
    Springer
    Hydrobiologia 246 (1992), S. 9-40 
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    ISSN: 1573-5117
    Keywords: Mollusca ; Gastropoda ; freshwater snails ; taxonomy ; distribution ; Africa ; Namibia ; Botswana ; Okavango River
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A systematic account is given of the aquatic gastropod fauna of the lower Okavango River in Namibia and Botswana, and of the East Caprivi area in Namibia, based on collections made mostly in 1983–86 from about 100 different sites. A total of 20 living species are reported, 9 of them for the first time from this area: Bellamya monardi, Lobogenes michaelis, Cleopatra elata, Afrogyrus coretus, Segmentorbis angustus, S. kanisaensis, Bulinus scalaris, B. depressus and B. tropicus. All are found outside this area and most are widely distributed Afrotropical species. Some do not occur farther south than the Okavango Delta, while others reach a south-western limit here but occur at greater latitude in the eastern tropical corridor on the coast of Natal. Bulinus globosus and Biomphalaria pfeifferi occur throughout the study area and are intermediate hosts for schistosome parasites of man and livestock.
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    An analysis of recent taxonomic concepts in wild potatoes (Solarium sect. Petota) (1992)
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    Genetic resources and crop evolution 39 (1992), S. 23-37 
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    ISSN: 1573-5109
    Keywords: germplasm ; potato ; Solanum sect. Petota ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Solanum L. sect. Petota Dumort., the potato and its wild relatives, contains 232 species, according to the latest taxonomic interpretation of Hawkes (1990). Section Petota is distributed in the Americas from the southwestern United States to southern Chile. This economically important group has attracted the attention of numerous taxonomists with various taxonomic philosophies. There are 531 validly published basionyms in the group, plus 67 nomina nuda or nomina dubia, and subsequent transfers to other ranks raise the number of names to 664. The taxonomy of sect. Petota has been dominated in recent years by J. G. Hawkes & J. P. Hjerting (co-workers) and C. M. Ochoa. The near simultaneous and independent publication of three recent books by these workers, treating the Bolivian species of sect. Petota, provides a novel opportunity to compare their taxonomic philosophies. Additionally, a recent independent treatment of all of the South American species by L. E. Gorbatenko provides a new interpretation of affiliations of species to series that is compared to the recent treatment of Hawkes and earlier treatments of S. M. Bukasov and D. S. Correll. These treatments differ in the placement of species into series, species boundaries, rank of infraspecific taxa, and hypotheses of hybridization. Our analysis illustrates the wide differences of taxonomic interpretation possible when independent workers treat the same material. The comparison provides insights into unresolved taxonomic questions in sect. Petota and indicates the need for a practical taxonomic resolution that will benefit plant breeders and other researchers on wild potatoes. Reasons for the discrepancies are discussed and suggestions for future research are provided.
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    The genus Mixodiaptomus Kiefer, 1932 (Copepoda, Diaptomidae) in Spain (1984)
    Springer
    Hydrobiologia 118 (1984), S. 135-146 
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    ISSN: 1573-5117
    Keywords: Copepoda ; Diaptomidae ; taxonomy ; biogeography ; ecology ; Mixodiaptomus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution of the Calanoid genus Mixodiaptomus was studied in a large number of pools and small lakes scattered over Spain. Four species occur: M. incrassatus, M. kupelwieseri, M. ortizi and M. laciniatus, the latter in 2 subspecies (M. laciniatus laciniatus and M. laciniatus atlantis). M. ortizi is described as a new species. M. laciniatus lives in mountains, while all other species occur in the plains. M. incrassatus is found all over the country, M. kupelwieseri only in the eastern part of Catalonia, M. laciniatus atlantis in Andalucia and M. ortizi in the central lands called Mesetas. All live in little mineralized waters and only M. incrassatus and M. laciniatus atlantis occur in clayey waters.
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    A canthobrama centisquama Heckel and the validity of the genus Mirogrex Goren, Fishelson and Trewavas (Osteichthyes: Cyprinidae) (1984)
    Springer
    Hydrobiologia 109 (1984), S. 275-278 
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    ISSN: 1573-5117
    Keywords: Cyprinidae ; Middle East ; taxonomy ; zoogeography ; Acanthobrama ; Mirogrex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The poorly known cyprinid fish Acanthobrama centisquama is re-described and its distribution is clarified. It is found in the Orontes basin and not waters around Damascus. The genus Mirogrex is synonymised with Acanthobrama.
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    On Pentacoelum hispaniensis, a marine triclad from Spanish freshwater (Platyhelminthes, Tricladida, Maricola) (1990)
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    Hydrobiologia 199 (1990), S. 101-106 
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    ISSN: 1573-5117
    Keywords: Tricladida ; Maricola ; Pentacoelum hispaniensis ; taxonomy ; ecology ; biogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The marine triclad Pentacoelum hispaniensis is known from a freshwater biotope near Valencia, Spain. Preliminary results suggest a diploid complement of 12 chromosomes for the species. A historical scenario is presented for the occurrence of P. fucoideum in the Caspian Sea and the Baltic Sea, and for the presence of P. hispaniensis in the Mediterranean.
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    Marine Oligochaeta of Jiaozhou Bay, Yellow Sea coast of China (1990)
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    Hydrobiologia 202 (1990), S. 107-124 
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    ISSN: 1573-5117
    Keywords: marine Oligochaeta ; Tubificidae ; Naididae ; Enchytraeidae ; Megascolecidae ; taxonomy ; biogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sixteen species of marine Oligochaeta (8 Tubificidae, 1 Naididae, 6 Enchytraeidae, 1 Megascolecidae) are recorded from the Qingdao area, at about 36° N on the Chinese Yellow Sea coast. Taxonomic remarks are given for most species, of which none appears new to science. Limnodriloides victoriensis Brinkhurst & Baker and Enchytraeus kincaidi Eisen, previously known from the Northeast Pacific, are described from Asia for the first time. These, as well as Monopylephorus rubroniveus Levinsen and a Lumbricillus sp., are interpreted as members of a temperate fauna, while all the remaining species have previously been reported from Hong Kong (at about 22° N) and thus are regarded as subtropical/tropical forms in the Yellow Sea.
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    Marine Oligochaeta of Jiaozhou Bay, Yellow Sea coast of China (1990)
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    Hydrobiologia 202 (1990), S. 107-124 
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    ISSN: 1573-5117
    Keywords: marine Oligochaeta ; Tubificidae ; Naididae ; Enchytraeidae ; Megascolecidae ; taxonomy ; biogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sixteen species of marine Oligochaeta (8 Tubificidae, 1 Naididae, 6 Enchytraeidae, 1 Megascolecidae) are recorded from the Qingdao area, at about 36° N on the Chinese Yellow Sea coast. Taxonomic remarks are given for most species, of which none appears new to science.Limnodriloides victoriensis Brinkhurst & Baker andEnchytraeus kincaidi Eisen, previously known from the Northeast Pacific, are described from Asia for the first time. These, as well asMonopylephorus rubroniveus Levinsen and aLumbricillus sp., are interpreted as members of a temperate fauna, while all the remaining species have previously been reported from Hong Kong (at about 22° N) and thus are regarded as subtropical/tropical forms in the Yellow Sea.
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    Desmids from Guma Valley (Sierra Leone, West Africa) (1990)
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    Hydrobiologia 208 (1990), S. 235-243 
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    ISSN: 1573-5117
    Keywords: desmids ; Africa ; taxonomy ; Staurastrum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Twenty-two taxa of desmids are reported from a pool near Guma Valley (Sierra Leone). Six are new to the country. A new variety of Staurastrum hystrix (S. hystrix var. granulatum) is described.
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    Name changes in fungi of microbiological, industrial and medical importance (1990)
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    Mycopathologia 111 (1990), S. 75-83 
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    ISSN: 1573-0832
    Keywords: Aleurisma carnis ; Amylomyces rouxii ; Aureobasidium pullulans ; Chrysosporium thermophilum ; Corynascus heterothallicus ; Dactylaria gallopava ; Diplorhinotrichum gallopavum ; Geomyces pannorum ; Hansenula ; Mucor rouxii ; Myceliophthora thermophila ; name changes ; Ochroconis gallopava ; Phoma herbarum ; Phoma pigmentivora ; Phoma violacea ; Pichia ; Pullularia pullulans ; Rhizopus arrhizus ; Rhizopus oryzae ; Sporendonema epizoum ; Sporendonema sebi ; Sporothrix schenckii ; Sporotrichum carnis ; Sporotrichum schenckii ; Sporotrichum thermophilum ; taxonomy ; Wallemia sebi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract This is the fourth in a series of reports bringing changes in the names of fungi of microbiological, industrial and medical importance to the attention of workers in these fields. The series is sponsored by the Division of Mycology of the International Union of Microbiological Societies (IUMS) and prepared under the auspices of the International Commission on the Taxonomy of Fungi (ICTF). The first of this series of reports included an introduction to the series explaining the need for name changes [1].
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    The problem of the taxonomy of the fusiform bacillus of acute necrotizing ulcerative gingivitis (Vincent's gingivitis) (1990)
    Springer
    Antonie van Leeuwenhoek 57 (1990), S. 55-58 
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    ISSN: 1572-9699
    Keywords: acute necrotizing ulcerative gingivitis ; Fusobacterium nucleatum ; Leptotrichia buccalis ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The characteristic microscopic appearance of the fusospirocheatal complex in smears from patients with acute necrotizing ulcerative gingivitis has long been regarded as virtually pathognomonic of the disease. Unfortunately there is considerable confusion surrounding the taxonomy of the fusiform organism in the fusospirochaetal complex. The conflicting views appear to be irreconcilable and a re-evaluation of the taxonomy of oral fusiforms is urgently required.
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    Capnobotryella renispora on roof tile (1990)
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    Antonie van Leeuwenhoek 58 (1990), S. 265-269 
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    ISSN: 1572-9699
    Keywords: black yeasts ; Capnobotryella renispora ; ecology ; sooty moulds ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Capnobotryella renispora J. Sugiyama is described from a specimen on roof tile and in culture. Its relationship with the black yeasts is discussed.
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    Genetic identification of naturalSaccharomyces sensu stricto yeasts from Finland, Holland and Slovakia (1992)
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    Antonie van Leeuwenhoek 61 (1992), S. 237-243 
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    ISSN: 1572-9699
    Keywords: electrophoretic karyotyping ; genetics ; Saccharomyces bayanus ; Saccharomyces cerevisiae ; Saccharomyces paradoxus ; taxonomy ; yeast ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic and karyotypic studies of naturalSaccharomyces sensu stricto yeasts from Finland, Holland and Slovakia revealed three wild sibling-species:Saccharomyces cerevisiae, Saccaromyces bayanus andSaccharomyces paradoxus.
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    Kluyveromyces piceae sp. nov., a new yeast species isolated from the rhizosphere ofPicea abies (L.) Karst (1992)
    Springer
    Antonie van Leeuwenhoek 62 (1992), S. 239-244 
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    ISSN: 1572-9699
    Keywords: Kluyveromyces piceae ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two strains of an undescribed species of the genusKluyveromyces were recovered from the rhizosphere of spruce. A description of the new species,Kluyveromyces piceae, is given and its classification on basis of ascospore shape, substrate utilization, G + C-content, DNA-DNA-reassociation data and habitat specifity is discussed.
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    Myxozyma neotropica sp. nov. (Candidaceae) — a new yeast species from costa rica (1992)
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    Antonie van Leeuwenhoek 62 (1992), S. 261-265 
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    ISSN: 1572-9699
    Keywords: Myxozyma neotropica ; Candidaceae ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two strains of an undescribed, soil-born species of the genusMyxozyma were recovered. They differ from other accepted species of this genus in their carbon assimilation pattern, mol% G+C and low extent of DNA complementary. A description of the new species,Myxozyma neotropica, and a key to the species accepted in the genus are given.
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    Neotypification of the genusTrichosporon (1992)
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    Antonie van Leeuwenhoek 61 (1992), S. 285-288 
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    ISSN: 1572-9699
    Keywords: Trichosporon ; basidiomycetous yeasts ; nomenclature ; taxonomy ; white piedra ; medical mycology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The currently accepted type species of the genusTrichosporon Behrend isT. beigelii. This species has formerly been regarded as identical toT. cutaneum. However, these fungi are now known to represent separate species with different ecology. The first species described inTrichosporon wasT. ovoides, an agent of human white piedra. A neotype strain is designated for this species, while a lectotype strain is indicated forT. cutaneum. The nameT. beigelii is considered as doubtful and consequently cannot be maintained.
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    Characterization of two sulfate-reducing bacteria from the gut of the soil-feeding termite, Cubitermes speciosus (1990)
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    Antonie van Leeuwenhoek 58 (1990), S. 271-275 
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    ISSN: 1572-9699
    Keywords: Cubitermes speciosus ; Desulfovibrio ; soil-feeding termite ; sulfate reduction ; symbiosis ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two sulfate-reducing bacteria (SRB) were isolated from a mixed culture enriched with benzoate obtained from gut homogenate of the soil-feeding higher termite, Cubitermes speciosus. The organisms were vibrioid rods, staining Gram-negative, which performed incomplete substrate oxidation. They differed in several features. The smaller one, strain STp, was motile with a single polar flagellum. This strain differed from Desulfovibrio desulfuricans only by its inability to oxidize malate and pentanol. The bigger one, strain STg, differed from Desulfovibrio giganteus only by its nonmotility and a lower length. It is the first evidence of the presence of SRB in termite gut.
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    Assignment ofKluyveromyces cellobiovorus nomen nudum toCandida intermedia (Ciferri & Ashford) Langeron et Guerra (1992)
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    Antonie van Leeuwenhoek 61 (1992), S. 57-60 
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    ISSN: 1572-9699
    Keywords: yeast ; Candida intermedia ; Kluyveromyces cellobiovorus ; taxonomy ; nDNA reassociation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A yeast culture isolated in Japan from soil and invalidly described asKluyveromyces cellobiovorus nom. nud. DBVPG 6286 (CBS 7153) was compared for its physiological and morphological properties and by nDNA-nDNA reassociation experiments with the type strains of several species of the genusKluyveromyces as well as of variousCandida species exhibiting similar phenotypic profiles. DBVPG 6286 was found to be conspecific with the type strain ofCandida intermedia (Ciferri & Ashford) Langeron et Guerra (1938).
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    The application of whole-cell protein electrophoresis for the classification and identification of basidiomycetous yeast species (1992)
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    Antonie van Leeuwenhoek 61 (1992), S. 69-78 
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    ISSN: 1572-9699
    Keywords: basidiomycetous yeasts ; protein electrophoregrams ; identification ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relationships among 65 basidiomycetous yeast strains were determined by one-dimensional electrophoresis of SDS-solubilized whole-cell proteins. Protein profiles were compared by the Pearson product moment correlation coefficient (r). The strains investigated represented species from the generaCystofilobasidium, Filobasidium, Filobasidiella, Kondoa, Leucosporidium, Mrakia andRhodosporidium. Except for the genusMrakia, all species constituted separate protein electrophoretic clusters. The species of the genusMrakia (M. frigida, M. gelida, M. nivalis andM. stokesii) show highly similar protein patterns, suggesting that these four species may be synonymous. Strains of two varieties ofFilobasidiella neoformans, F. neoformans var.neoformans andF. neoformans var.bacillispora, could not be differentiated by protein electrophoresis. For the delineation of the protein electrophoretic clusters of the yeasts studied, literature data relying on other criteria, such as DNA base composition, carbon source utilization patterns, enzymatic protein electrophoregrams, ubiquinone systems, DNA-DNA homology and rRNA sequence data were used. It was demonstrated that a database of SDS-protein patterns provides a valuable tool for the identification of yeasts.
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    Systematics of theLactobacillus population on rat intestinal mucosa with special reference toLactobacillus reuteri (1992)
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    Antonie van Leeuwenhoek 61 (1992), S. 175-183 
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    ISSN: 1572-9699
    Keywords: taxonomy ; Lactobacillus ; rat ; intestine ; mucosa ; L. reuteri
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The systematics of theLactobacillus population of the intestines of 88 different rats was studied; 80 rats had been fed on fermented oat-meal soup (Molin et al. 1992). One-hundred-twenty-twoLactobacillus strains from the intestinal mucosa were phenotypically classified together with twenty-eight reference strains ofLactobacillus andLeuconostoc, using 49 unit characters. Data were examined using Jaccard coefficient, and unweighted pair group algorithm with arithmetic averages. Two major and eleven minor clusters were defined at the 76% SJ-similarity level: Cluster 1 included thirty isolates which could not be identified further, but had resemblance to the type strains ofL. jensenii, L. gasseri, L. crispatus, and to some extent toL. acidophilus. Cluster 12 including fifty-four intestinal isolates was identified asL. reuteri; and so was cluster 13 (five isolates). Isolates of the major clusters were found in all parts of the intestines. The genomic homogeneity of theL. reuteri isolates was scrutinized by endonuclease restriction analysis of the chromosomal DNA, and the isolates could be divided into six genomic strains.
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    Isolation and growth of a bacterium able to degrade nitrilotriacetic acid under denitrifying conditions (1990)
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    Biodegradation 1 (1990), S. 31-41 
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    ISSN: 1572-9729
    Keywords: biodegradation ; denitrification ; isolation of NTA-degrading bacterium ; nitrilotriacetic acid (NTA) ; taxonomy ; wastewater treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A Gram-negative bacterium was isolated from river sediment which was able to grow with nitrilotriacetic acid as a combined carbon, nitrogen and energy source in the absence of molecular oxygen using nitrate as the terminal electron acceptor. Batch growth parameters and mass balances are reported for growth under both aerobic and denitrifying conditions. The strain was characterized with respect to its substrate spectrum and other physiological properties. This denitrifying isolate is serologically unrelated to the comprehensively described Gram-negative obligately aerobic NTA-degrading bacteria all of which belong to the α-subclass of Proteobacteria. Chemotaxonomic characterization, which revealed the presence of spermidine as the main polyamine and ubiquinone Q-8, excludes the new isolate from the phylogenetically redefined genus Pseudomonas and indicates a possible location within the γ-subclass of Proteobacteria close to, but separate from the genus Xanthomonas.
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    The taxonomic status of closely related closed cone pines in Mexico and Central America (1990)
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    New forests 4 (1990), S. 291-307 
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    ISSN: 1573-5095
    Keywords: Pinus tecunumanii ; P. oocarpa ; P. oocarpa var. ochoterenae and P. patula var. longipedunculata ; P. patula var. patula ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A taxonomic study on 14 cone and needle traits of 281 trees from 33 provenances of Pinus oocarpa, P. oocarpa var. ochoterenae, P. patula var. longipedunculata, P. patula var. patula and P. tecunumanii in Central America and Mexico was conducted to quantify the affinity between closely related species. A second objective was to determine the geographic range of P. tecunumanii in Mexico. Cluster analysis placed 52% of all provenances in taxa different from those assigned by field foresters. Trees from 15 provenances of what was locally known as Pinus oocarpa var. ochoterenae from Chiapas were statistically indistinguishable from high elevation Central American sources of P. tecuncumanii when assessed for cone and needle characteristics. However, trees from two provenances known locally as P. oocarpa var. ochoterenae from southwestern Oaxaca, Juquila and Tlacuache, were found to be distinct from P. tecunumanii and may be a variant of P. patula. Canonical discriminant analysis was used to determine the taxonomic affinity among newly formed clusters. The spatial (Mahalanobis) distance between P. tecunumanii and P. patula var. patula, P. patula var. longipedunculata, and P. oocarpa was 42.0, 44.4, and 109.4 respectively, and highly significant. The geographic range of Pinus tecunumanii in Mexico appears to be confined to the state of Chiapas.
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    The rotifer fauna and population dynamics of Lake Studer 2 (Kerguelen Archipelago) with description of Filinia terminalis kergueleniensis n. ssp. and a new record of Keratella sancta Russel 1944 (1984)
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    Hydrobiologia 108 (1984), S. 57-64 
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    ISSN: 1573-5117
    Keywords: rotifers ; taxonomy ; population dynamics ; biomass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Filinia terminalis kergueleniensis nov. spp. (Family Filiniidae Bartos 1959), from Lake Studer 2 is described and figured. Filinia terminalis kergueleniensis differs from the type in length of bristles and their insertion. Keratella sancta was found again; it is the third record after its discovery by Russel 1944 in New Zealand. Notholca cf. jugosa Gosse 1889 is also found in the plankton of the subantarctic lake. The new subspecies and Keratella sancta occur all year round, while Notholca cf. jugosa is sporadic. Population dynamics appear to be dependent on changes in temperature and chlorophyll content. We have estimated the relative contribution of these three species to community biomass from their numerical abundance and measured volumes. The major community biomass peak lasts from March to June with a secondary maximum between October and January.
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    The rotifer fauna and population dynamics of Lake Studer 2 (Kerguelen Archipelago) with description ofFilinia terminalis kergueleniensis n. ssp. and a new record ofKeratella sancta Russel 1944 (1984)
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    Hydrobiologia 108 (1984), S. 57-64 
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    ISSN: 1573-5117
    Keywords: rotifers ; taxonomy ; population dynamics ; biomass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Filinia terminalis kergueleniensis nov. spp. (FamilyFiliniidae Bartos 1959), from Lake Studer 2 is described and figured.Filinia terminalis kergueleniensis differs from the type in length of bristles and their insertion.Keratella sancta was found again; it is the third record after its discovery by Russel 1944 in New Zealand.Notholca cf.jugosa Gosse 1889 is also found in the plankton of the subantarctic lake. The new subspecies andKeratella sancta occur all year round, whileNotholca cf.jugosa is sporadic. Population dynamics appear to be dependent on changes in temperature and chlorophyll content. We have estimated the relative contribution of these three species to community biomass from their numerical abundance and measured volumes. The major community biomass peak lasts from March to June with a secondary maximum between October and January.
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    Revision of the African species of the genus Mesocyclops Sars, 1914 (Copepoda: Cyclopidae) (1984)
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    Hydrobiologia 109 (1984), S. 3-66 
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    ISSN: 1573-5117
    Keywords: Copepoda ; Mesocyclops ; Africa ; revision ; taxonomy ; zoogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A revision is made of the African Mesocyclops species, based on type material (when extant) and on collections from various parts in Africa. Diagnostic characteristics are: presence or absence of spinule patterns on antennular segments, structure of the hyaline membrane of the 17th antennular segment, spine pattern on the basipodite of the antenna, armature of the maxillulary palp, presence or absence of a spine on the basipodite of P1, armature of the connecting lamella, coxopodite and basipodite of P4, armature of the apical spines of Enp3P4, armature of the last thoracic segment, genital segment and the other abdominal segments, armature of the furcal rami and structure of the receptaculum seminis. First, the taxonomical status of M. leuckarti (Claus) is redefined; this species does not occur in Africa and its geographical range is restricted to Europe and the western part of Northern Asia. On the African continent, twelve other taxa are found. Four are described as new to science: M. kieferi sp.n., M. dussarti sp.n., M. spinosus sp.n. and M. aequatorialis similis subsp.n. The remainder are: M. major Sars, M. tenuisaccus (Sars), M. paludosus Lindberg, M. salinus Onabamiro, M. ogunnus Onabamiro, M. aspericornis (Daday), M. rarus Kiefer and M. aequatorialis aequatorialis (Kiefer). Their geographical distribution is discussed. Eleven taxa are restricted to the African continent (including the Arabian Peninsula and the Canary Islands). One taxon is also found in the Oriental Region. Madagascan representatives are briefly mentioned. The importance of breeding and cross-breeding experiments should be stressed in copepod taxonomy. Experiments were performed on African species and M. leuckarti to evaluate the morphological characters used in the present study, and intraspecific morphological variability was examined up to and including the third generation (Van de Velde, in press). In future one should critically reconsider the so-called cosmopolitan species; they may indeed represent a complex of related taxa, each with a geographical range more restricted than that of the species-complex itself.
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    Remarques taxonomiques sur quelques rotiferès des tourbières avec la description d'une espèce et d'une sous-espèce nouvelles (1984)
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    Hydrobiologia 109 (1984), S. 125-130 
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    ISSN: 1573-5117
    Keywords: rotifers ; taxonomy ; peat bogs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des prévisions d'ordre taxonomique sont apportées sur quelques espèces intéressantes de rotifères des tourbières: Lepadella quadricurvata n. sp. et Lepadella koniari arvernae n. ssp. nouvelles pour la science sont d\'ecrites La pr\'esence de trois rares esp\`eces de Lecane (L. lauterborni, L. sagula et L. kluchor) est signal\'ee et leurs variations sont \'etudi\'ees Le probl\`eme de la synonymie de Trichocerca montana Hauer et de T. intermedia (Stenroos) est discut\'e L'existence de formes interm\'ediaires entre trois esp\`eces de Trichocerca (T. porcellus, T. parvula, T. musculus) est soulign\'ee.
    Notes: Abstract Taxonomic notes about peat-bog rotifers with a description of one new species and one new subspecies. Variations and problems about some peat-bog rotifers (especially the genera Lecane and Keratella) are discussed. Descriptions of Lepadella quadricurvata nov. sp. and Lepadella koniari arvernae nov. ssp. are added. {xxCes notes résultent d'une étude effectuée en 1980 dans une dizaine de tourbières du Puy-de-Dôme (France Centrale). Au cours de ce travail nous nous sommes heurtés à quelques problèms interéssants de taxonomie qu'il nous paraît utile de soulever, les rotifères des tourbières restant un domaine peu exploré.}
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    A review of the rotifer fauna of the Sudan (1984)
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    Hydrobiologia 110 (1984), S. 113-130 
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    ISSN: 1573-5117
    Keywords: Sudan ; rotifers ; taxonomy ; biogeography ; Africa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A collection of rotifers contained in samples from the Blue, White and joint Niles in the Sudan, the Red Sea Hills, and Jebel Marra mountains is studied, and the previous literature on the rotifera of Sudan is reviewed. A total of 145 rotifer taxa are now known from this country. Ecological and distributional notes on selected species are added. Besides cosmopolitan, pantropical, and tropical species, a small but significant fraction of the fauna is of northern origin, possibly reflecting climatic conditions of the late-Pleistocene.
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    Cladocera from the Sudan: Red Sea Hills, Jebel Marra and valley of the main Nile (1984)
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    Hydrobiologia 110 (1984), S. 163-169 
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    ISSN: 1573-5117
    Keywords: Sudan ; Cladocera ; biogeography ; taxonomy ; Sudan ; Nile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Twenty species of Cladocera are reported from the Nile, where lacustrine species dominate, and from Jebel Marra and the Red Sea Hills, where chydorids dominate. The community found in the Red Sea Hills is more typically desertic than that of Jebel Marra, which appears closely related to the fauna of the West and Central African Sahel.
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    On the freshwater ostracods (Crustacea, Ostracoda) of the Sudan, with special reference to the Red Sea Hills, including a description of a new species (1984)
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    Hydrobiologia 110 (1984), S. 137-161 
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    ISSN: 1573-5117
    Keywords: Sudan ; freshwater ostracods ; Africa ; taxonomy ; zoogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A collection of freshwater ostracods from the Sudan is studied and 18 species are recorded. Paracypretta amati sp.n. is new to science. A redescription of the holotype female of Paracypretta aratra (Brady, 1904) (not recorded in this collection) and a provisional key to the species of Paracypretta are given. Heterocypris giesbrechtii (G. W. Müller, 1898) is re-described; Heterocypris sobrinus (Masi, 1932) is placed in the synonymy of H. fretensis; Hemicypris intermedia (Lindroth, 1953) is recorded for the first time since its original description and is redescribed, while Cyprinotus largereticulatus Rome, 1969 is transferred to Hemicypris. The zoogeographical composition of this fauna is briefly discussed.
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    The calanoid copepods of the Nile system (1984)
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    Hydrobiologia 110 (1984), S. 191-212 
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    ISSN: 1573-5117
    Keywords: Sudan ; Copepoda ; Calanoida ; taxonomy ; biogeography ; Africa ; Nile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract At least 11 or 12 calanoid taxa occur in the Nile system. One species is typical of the river and of Lake Chad (Th. galebi); two are restricted to Lake Victoria (Th. galeboides, T. stuhlmanni), but both might be only subspecies to more widespread species. One is restricted to Lakes Edward and George (T. worthingtoni) but is a little known species. No calanoids are on record from Lakes Albert and Kyoga, while the species reported from Lake Turkana (T. banforanus) is out of range, and almost certainly represents an erroneous record. Among the remaining species, four are East-African, ranging from the southern tip of the continent to the Ethiopian plateau and the Nile valley (P. schultzei, Th. mixtus, T. kraepelini, T. cf orientalis), while two are Sahelian species that span Africa from east to west (M. mauretanicus, T. processifer et ssp.). Two new synonyms are introduced. One new subspecies (T. processifier friedae) is described from the Ethiopian plateau. It is suggested that Tropodiaptomus orientalis (Brady, 1886), the type species of its genus, should not be considered a nomen dubium, but should be redescribed on its type female(s) and on topotypical males from Sri Lanka.
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    Caractères taxinomiques et spécificité dans le genreAsplanchna (Rotifère) (1984)
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    Hydrobiologia 112 (1984), S. 41-44 
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    ISSN: 1573-5117
    Keywords: rotifers ; Asplanchna ; taxonomy ; specificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A comparative analysis of eight characters in two clones ofA. brightwelli and a clone ofA. intermedia, fed withParamecium orBrachionus, is made to determine the intraclonal, interclonal and interspecific variations in this complex of species. The trophi morphology appears the most species specific criterium whereas the other features (size of males, diameter and ornamentation of resting eggs, nuclear number in syncytial glands) show variability, either genetic or related to environmental conditions. The variation observed in the ornamentation of resting eggs and in the nuclear number of vitellogen was distributed along a continuous gradient.
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    Staurastrum dilatatum var.thomassonii var. nov. (1990)
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    Hydrobiologia 194 (1990), S. 115-118 
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    ISSN: 1573-5117
    Keywords: Staurastrum dilatatum var.thomassonii var. nov. ; taxonomy ; scanning el. microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The new varietyStaurastrum dilatatum Ehr. var.thomassonii is described and illustrated.
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    Alona hercegovinae n. sp. (Cladocera: Chydoridae), a blind cave-inhabiting Cladoceran from Hercegovina (Yugoslavia) (1990)
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    Hydrobiologia 199 (1990), S. 7-16 
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    ISSN: 1573-5117
    Keywords: Cladocera ; Chydoridae ; taxonomy ; hypogean waters ; Yugoslavia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two interesting chydorid Cladocera were found in caves of Hercegovina and are described here. The pantropical Alona diaphana King, 1853 was already known in this part of Europe, but was found in a cave environment for the first time. Alona hercegovinae n. sp. is an eyeless and stygobiontic species, and was found in three caves.
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    Recent approaches to the taxonomy of the Gracilariaceae (Gracilariales, Rhodophyta) and the Gracilaria verrucosa problem (1990)
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    Hydrobiologia 204-205 (1990), S. 111-118 
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    ISSN: 1573-5117
    Keywords: seaweed ; Gracilariaceae ; taxonomy ; plastid DNA restriction ; chromosomes ; hybridization ; anatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Recognition of species in the Gracilariaceae, often notoriously difficult, is being aided by a combination of classical and modern techniques. We review some recent findings and present new results that may lead to redefinition of Gracilaria verrucosa, the type species of its genus. Plastid DNA restriction profiles (patterns of banding obtained by electrophoresis of DNA after restriction endonuclease digestion) from eleven strains ascribed to G. verrucosa indicated that the concept of this species in northern Europe includes possibly three taxa, one of which is known now to be a species of Gracilariopsis. In contrast, restriction profiles from Argentinian and Japanese strains were closely similar to the predominant pattern for European G. verrucosa. Profiles of several other strains, from the western Atlantic and eastern Pacific, were dissimilar to the European group and to each other. A chromosome number of n = 24 was determined for a representative of the predominant European group, and preliminary results of hybridization trials suggest that these strains, and others with approximately the same plastid DNA restriction pattern, are interfertile.
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    URL: http://dx.doi.org/10.1007/BF00040222
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  • 91
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    Morphogeographic variations in the genusMesopodopsis Czerniavsky with descriptions of three new species (Crustacea, Mysidacea) (1992)
    Springer
    Hydrobiologia 241 (1992), S. 71-89 
    Details
    ISSN: 1573-5117
    Keywords: taxonomy ; biogeography ; euryhaline species ; mysids ; Mesopodopsis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Most of the exceptional morphological features of the genusMesopodopsis are shared withNanomysis, Diamysis, andLimnomysis in a mosaic-like pattern. This group, comprising euryhaline species from fresh-to metahaline waters, has its centre of recent species richness in the Mediterranean to Ponto-Caspian region. Within the genus one may distinguish two morphogeographic groups, Euro-African species with a spine below the statocyst, and Indo-Australasian species without this spine. Detailed study from the entire distribution range indicates thatM. slabberi (van Beneden) should be split into 4 species: the nominal form from the NE-Atlantic, Mediterranean, and Black Sea, with 5–8 segments on the tarsus of the fourth thoracic endopod;M. aegyptia n.sp., widely distributed in the Mediterranean, with 7–9 segments on this tarsus as well as dimorphic setation patterns on the eighth tarsus;M. tropicalis n.sp. from equatorial W-Africa with 5–6 segments and dimorphic setation patterns on the mandibular palp; andM. wooldridgei n.sp. from South African waters with 9–12 segments on the tarsal joint of the fourth thoracic appendage, respectively. A key to the seven known species of the genus is given.
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    URL: http://dx.doi.org/10.1007/BF00008261
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  • 92
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    Rotifera from north and northeast Anatolia (Turkey) (1992)
    Springer
    Hydrobiologia 245 (1992), S. 179-189 
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    ISSN: 1573-5117
    Keywords: rotifera ; zoogeography ; Turkey ; taxonomy ; L. costatoides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Samples from 21 freshwater sites in Turkey yielded 91 different species of Rotifera, 42 of which are new to the Turkish fauna. Lepadella costatoides n. sp. is described and L. costata Wulfert is redescribed. L. christineae Koste is synonymised with L. quinquecostata (Lucks). Remarks on the intraspecific variability of some species of Lecane are given. L. pomiformis Edmondson is added to the synonymy of L. pyriformis (Daday). The synonymy of the latter with L. paraclosterocerca Pennak is confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006159
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  • 93
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    Six new species of the genus Diplopeltula (Nematoda: Diplopeltidae) with remarks on the heterogeneity of the taxon (1992)
    Springer
    Hydrobiologia 230 (1992), S. 165-178 
    Details
    ISSN: 1573-5117
    Keywords: marine nematodes ; Diplopeltula ; Diplopeltidae ; taxonomy ; new species
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Six new Diplopeltula species are described: D. pulchra sp.n., D. belgica sp.n., D. striolata sp.n. and D. curta sp.n. (Southern Bight of the North Sea), D. nellyae sp.n. and S. pumila sp.n. (New Caledonia). Diplopeltula indica Gerlach, 1962 is redescribed from Guadeloupe (FWI). Based on the examination of these seven Diplopeltula species, the genus has been reappraised. The systematic position of the other genera of the Diplopeltidae Filipjev, 1918 is also discussed. Diplopeltoides Gerlach, 1962 is moved from the Aegialoalaimidae Lorenzen, 1981 to the Diplopeltidae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036563
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  • 94
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    Insect resistance in potatoes: sources, evolutionary relationships, morphological and chemical defenses, and ecogeographical associations (1992)
    Springer
    Euphytica 61 (1992), S. 83-111 
    Details
    ISSN: 1573-5060
    Keywords: chemical defense ; Colorado potato beetle ; Empoasca fabae ; Epitrix cucumeris ; evolution ; germplasm ; green peach aphid ; insect resistance ; Leptinotarsa decemlineata ; Macrosiphum euphorbiae ; morphology ; Myzus persicae ; potato aphid ; potato flea beetle ; potato leafhopper ; relationship ; Solanum ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The past 25 years, 1686 potato accessions, representing 100 species in the genus Solanum L., subgenus Potatoe, section Petota, were evaluated for field resistance to one or more of the following insect pests: green peach aphid, Myzus persicae (Sulzer); potato aphid, Macrosiphum euphorbiae (Thomas); Colorado potato beetle, Leptinotarsa decemlineata (Say); potato flea beetle, Epitrix cucumeris (Harris); and potato leafhopper, Empoasca fabae (Harris). Accessions highly resistant to green peach aphid were identified within 36 species, to potato aphid within 24 species, to Colorado potato beetle within 10 species, to potato flea beetle within 25 species, and to potato leafhopper within 39 species. Resistance levels were characteristic within Solanum species. Insect resistance appears to be a primitive trait in wild potatoes. Susceptibility was most common in the primitive and cultivated Tuberosa. Insect resistance was also characteristic of the most advanced species. The glycoalkaloid tomatine was associated with field resistance to Colorado potato beetle and potato leafhopper. Other glycoalkaloids were not associated with field resistance at the species level. Dense hairs were associated with resistance to green peach aphid, potato flea beetle, and potato leafhopper. Glandular trichomes were associated with field resistance to Colorado potato beetle, potato flea beetle, and potato leafhopper. Significant correlations between insect score and altitude of original collection were observed in six of thirteen species. Species from hot and arid areas were associated with resistance to Colorado potato beetle, potato flea beetle, and potato leafhopper. Species from cool or moist areas tended to be resistant to potato aphid.
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    URL: http://dx.doi.org/10.1007/BF00026800
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  • 95
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    Ecuador, 1991 potato germplasm collecting expedition: taxonomy and new germplasm resources (1992)
    Springer
    Euphytica 60 (1992), S. 159-169 
    Details
    ISSN: 1573-5060
    Keywords: collecting expedition ; Ecuador ; genebank ; germplasm ; Solanum spp. ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary We conducted a joint Ecuador/Colombia/United States wild potato (Solanum sect. Petota) germplasm collecting expedition in Ecuador from April 13–July 1, 1991. The goals of the expedition were to collect germplasm and study the species boundaries of all of the 25 Ecuadorian taxa accepted by current taxonomists. We made 126 collections of 24 of these 25 taxa, 113 as germplasm samples, 13 only as herbarium collections. We synonymize six of these 25 names (S. baezense Ochoa, S. cyanophyllum Correll, S. pichinchense Bitter & Sodiro, S. serratoris Ochoa, S. suffrutescens Correll as synonyms of S. andreanum Baker; S. correllii Ochoa as a synonym of S. regularifolium Correll). Four other names (S. chomatophilum f. angustifoliolum Correll, S. moscopanum Hawkes, S. solisii Hawkes, S. tundalomense Ochoa) could not be consistently distinguished from S. colombianum Dunal in the field. We are currently investigating them to determine their species status.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039394
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