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  • 1
    ISSN: 1439-0361
    Keywords: mate choice ; taxonomy ; phenotypic hybrids ; fitness ; decision rule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die als Unterarten klassifizierten europäischen Formen der Aaskrähe, Rabenkrähe und Nebelkrähe, besiedeln verschiedene, aneinandergrenzende Verbreitungsgebiete und hybridisieren in der Kontaktzone. Die Nachkommen von Mischpaaren sind fruchtbar und können sowohl mit anderen Hybriden als auch mit Raben- und Nebelkrähen erfolgreich brüten. Trotzdem kommt es zu keiner völligen Vermischung der Formen und/oder Verlagerung der Verbreitungsgebiete. Vor diesem Hintergrund untersuchten wir die Partnerwahl von Aaskrähen in der Hybridisierungszone auf der nordfriesischen Insel Amrum und stellten fest, daß Partner gleichen Phänotyps häufiger miteinander verpaart waren, als stochastisch zu erwarten gewesen wäre. Unsere Daten bestätigen vergleichbare Studien aus Hybridisierungszonen in Italien und Sibirien. Wir schließen daraus, daß phänotypisch selektive Partnerwahl bei der Aaskrähe ein allgemeines Phänomen sein könnte und diskutieren, warum dieses Verhalten anfitness-relevante Parameter gekoppelt sein sollte. Um welche es sich dabei handeln könnte, wurde bisher nicht hinreichend untersucht und muß deshalb offen bleiben.
    Notes: Summary Carrion Crow and Hooded Crow are regarded as subspecies of the Crow. They show frequent hybridisation along the adjacent borders of their distribution. Mixed pairs produce fertile offspring which are able to breed successfully with both hybrids and mates of either phenotype. However, hybridisation does not lead to phenotypic changes of Carrion and Hooded Crows in general nor in their distinct distribution. We studied the mating behaviour of Crows in the hybrid zone on the Island of Amrum (Schleswig-Holstein, Germany) and found evidence that Crows may prefer mates of the same phenotype. Our data confirm previous studies which reported assortative mating with respect to plumage coloration from hybrid zones in Italy and Siberia. We discuss why this behaviour should be related tofitness traits which in our opinion have not yet been studied adequately nor identified.
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  • 2
    ISSN: 1572-9397
    Keywords: evolutionary algorithms ; genetic algorithms ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper shows how evolutionary algorithms can be described in a concise, yet comprehensive and accurate way. A classification scheme is introduced and presented in a tabular form called TEA (Table of Evolutionary Algorithms). It distinguishes between different classes of evolutionary algorithms (e.g., genetic algorithms, ant systems) by enumerating the fundamental ingredients of each of these algorithms. At the end, possible uses of the TEA are illustrated on classical evolutionary algorithms.
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  • 3
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    Journal of paleolimnology 9 (1993), S. 63-68 
    ISSN: 1573-0417
    Keywords: Chrysophyceae ; stomatocysts ; membrane topography ; biogenic silica deposition ; surface pattern ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
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  • 4
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    Journal of paleolimnology 6 (1991), S. 257-260 
    ISSN: 1573-0417
    Keywords: Chrysophyceae ; stomatocysts ; biogenic silica deposition ; polymer gels ; surface pattern ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The utility of classifying chrysophyte stomatocysts by their characteristic honeycomb and ridge patterns is questioned, because a strikingly similar expanding pattern appears on the surface of ionized polymer gels during osmotical swelling as a result of simple physical forces. The rapid accumulation of silicate into a spherical cyst inside a chrysophyte cell appears to be as a physical process sufficiently similar to result in an analogous pattern in microscopic scale. Chrysophyte stomatocysts that possess honeycomb or ridge patterns could be regarded as ‘frozen moments’ of the pattern evolution during the silicate gel phase. As a consequence, such structures should have little taxonomical value.
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  • 5
    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.
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  • 6
    ISSN: 1573-0832
    Keywords: Africa ; Fusarium ; F. moniliforme ; grain ; Lesotho ; mating population ; Nigeria ; taxonomy ; Zimbabwe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Several Fusarium species have been found associated with millet and sorghum in Nigeria, Lesotho and Zimbabwe. Amongst these, some isolates were originally identified as short- and long-chained types of F. nygamai. However, there was some question as to the correct identification of the long chained types. This study reclassified some of the isolates with long microconidial chains as F. moniliforme. Morphologically, these strains do not produce chlamydospores like F. nygamai, but produce swollen hyphal cells or resistant hyphae. The isolates in this study were crossed with the mating-type tester strains of Gibberella fujikuroi (F. moniliforme and G. nygamai (F. nygamai). Of the isolates with long chains of microconidia and other characteristics of F. moniliforme, 36% crossed with mating population ''A'' of G. fujikuroi. Of the isolates with characteristics of F. nygamai, 65% crossed with the testers used to produce the teleomorph of F. nygamai. Mating tests support the separation of the sample population into F. moniliforme and F. nygamai. The results of this study show that genetics can be an aid in resolving some problems in fungal taxonomy.
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  • 7
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    Antonie van Leeuwenhoek 53 (1987), S. 143-146 
    ISSN: 1572-9699
    Keywords: Cyphellophora ; taxonomy ; rhizosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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  • 8
    ISSN: 1572-9699
    Keywords: Sporobolomyces phylladus ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Six strains of an undescribed, leaf-borne species of the genus Sporobolomyces were recovered. A description of the new species, Sporobolomyces phylladus, is given.
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  • 9
    ISSN: 1572-9699
    Keywords: Zygozyma suomiensis ; Lipomycetaceae ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species of the genus Zygozyma, Z. suomiensis, is described, based on the study of a single strain, derived from a bovine skin lesion.
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  • 10
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    Antonie van Leeuwenhoek 57 (1990), S. 223-236 
    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.
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  • 11
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    Antonie van Leeuwenhoek 58 (1990), S. 95-98 
    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.
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  • 12
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    Antonie van Leeuwenhoek 56 (1989), S. 349-356 
    ISSN: 1572-9699
    Keywords: coenzyme Q ; ubiquinones ; black yeasts ; Exophiala ; Aureobasidium ; Hormonema ; yeast-like fungi ; ascomycetes ; taxonomy ; chemotaxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 72 Strains belonging to 44 species of ascomycetous black yeasts were analyzed for their coenzyme Q systems. Prevalent were Q-10 and dihydrogenated Q-10 systems. Members of the Dothidealean suborder Dothideineae have Q-10 (H2), while those belonging to the suborder Pseudosphaeriineae mostly have Q-10. The anamorph genus Exophiala Carmichael and the teleomorph genus Capronia Sacc. seem to be heterogenous.
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  • 13
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    Antonie van Leeuwenhoek 57 (1990), S. 59-61 
    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.
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  • 14
    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).
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  • 15
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    Antonie van Leeuwenhoek 61 (1992), S. 245-248 
    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.
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  • 16
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    Antonie van Leeuwenhoek 61 (1992), S. 289-316 
    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.
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  • 17
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    Antonie van Leeuwenhoek 71 (1997), S. 375-378 
    ISSN: 1572-9699
    Keywords: Candida novakii ; taxonomy ; yeasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two strains of an undescribed species of the genus Candida were isolated from decaying wood of Quercus sp. A description of the new species Candida novakii is given.
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  • 18
    ISSN: 1572-9699
    Keywords: phylogeny ; prosthecobacter ; taxonomy ; Verrucomicrobia ; Verrucomicrobiae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four strains of nonmotile, prosthecate bacteria were isolated in the 1970s and assigned to the genus Prosthecobacter. These strains were compared genotypically by DNA/DNA reassociation and 16S rDNA based phylogenetic analyses. Genotypic comparisons were complemented with phenotypic characterizations. Together, these studies clearly indicate each Prosthecobacter strain represents a novel species of bacteria. We propose three new species of Prosthecobacter, P. dejongeii strain FC1, P. vanneervenii strain FC2, and P. debontii strain FC3; P. fusiformis is reserved for the type strain of the genus, strain FC4. Additionally, we propose the genera Prosthecobacter and Verrucomicrobium, currently members of the order Verrucomicrobiales, to comprise a novel higher order taxonomic group, the division Verrucomicrobia div. nov. and the class Verrumicrobiae class nov. Many novel members of the Verrucomicrobia, as revealed by molecular ecology studies, await isolation and description.
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  • 19
    ISSN: 1572-9699
    Keywords: keratinophilic fungi ; Neoarachnotheca ; Neoarachnotheca keratinophila ; Nannizziopsis tropicalis ; Onygenales ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Neoarachnotheca is proposed as a new genus of Onygenales. The outstanding generic characteristics are white, spherical ascomata with a wall formed by a network of hyphae and spherical, subhyaline ascospores with an irregular sheath. Nt. keratinophila, the type species, characterized by wavy peridial hyphae has been isolated from marine and river sediments and Myriodontium keratinophilum is its anamorph. Nannizziopsis tropicalis is proposed as a new species based on a strain isolated from soil in Burundi. RFLPs analysis of ITS and 5.8S rDNA support these proposals. The differences with related genera are discussed.
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  • 20
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    Antonie van Leeuwenhoek 74 (1998), S. 229-235 
    ISSN: 1572-9699
    Keywords: Dipodascus capitatus ; D.spicifer ; Geotrichum clavatum ; yeast ; taxonomy ; DNA heterogeneity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The G+C contents of 25 strains of Dipodascus capitatus, Dipodascus spicifer and Geotrichum clavatum were found to be heterogeneous on basis of derivative graphs of the melting profiles. Strains showing similar derivative graphs of the melting curve exhibited high levels of DNA homology (80-100%); strains showing dissimilar derivative graphs exhibited low levels of DNA homology (5 to 45%). Being considered separate taxa on basis of these parameters, D. capitatus, D. spicifer and G. clavatum could be identified by a combination of the key characteristics growth on xylose, cellobiose, salicin and arbutin.
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  • 21
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    Antonie van Leeuwenhoek 66 (1994), S. 337-342 
    ISSN: 1572-9699
    Keywords: Debaryomyces ; phylogeny ; ribosomal RNA ; taxonomy ; Wingea ; yeasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Extent of divergence in partial nucleotide sequences from large and small subunit ribosomal RNAs was used to estimate the evolutionary relationship between the generaWingea andDebaryomyces. These data showed the monotypic genusWingea to be congeneric withDebaryomyces, and it is proposed to transferW. robertsii toDebaryomyces.
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  • 22
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    Plant molecular biology reporter 16 (1998), S. 147-155 
    ISSN: 1572-9818
    Keywords: allele-specific PCR ; Beta ; ITS1 ; plant identification ; rDNA ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sequence variation in the ITS1 locus of the nuclear ribosomal DNA in beets has previously been used to reconstruct phylogeny of the species in the genus Beta. We have developed protocols that allow the identification of Beta taxa by use of taxon-specific primers. Beta sections, species and subspecies can be identified. Differences within the ITS1 region of a single base can be exploited for species identification. The results from this study not only provide effective methods for wild beet identification, but also indicate the potential use of the techniques in other crops.
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  • 23
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    Journal of insect conservation 2 (1998), S. 151-159 
    ISSN: 1572-9753
    Keywords: Orthoptera ; biodiversity ; taxonomy ; conservation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract It is estimated that only 10–15% of the world's insect fauna has been described and named. Efforts to inventory insect biodiversity are hampered by this taxonomic impediment, which is compounded by the logistical problems of an insufficient taxonomic workforce and their remote location in museums thousands of miles from the areas of highest biodiversity. Compared to most other invertebrate groups however, the taxonomic impediment is relatively benign in the order Orthoptera. This is a small to medium-sized order (approximately 20 000 described species) which is well known taxonomically, owing to the group's agricultural importance worldwide. Furthermore, orthopteran taxonomists are now fortunate to have a published up-to-date catalogue of all known species, which has just become accessible as a regularly updated database on the World Wide Web. Whilst new information technology, in the form of e-mail networks, World Wide Web sites and CD-ROM information archives, is already enhancing communication between specialists and helping to reduce the logistical problems of documenting orthopteran biodiversity, a major reinvestment in basic taxonomic research is needed if we are to reduce the existing taxonomic impediment significantly. There is general agreement that an internationally coordinated approach will be necessary and priorities must be set to tackle the biodiversity/systematics crisis. In the future, the Orthoptera can make an important contribution to invertebrate faunal surveys and have potential as an indicator taxon. Furthermore, the Orthoptera Species File establishes a taxonomic framework which could be readily enlarged to include geographic data and phenology of species from existing museum specimens.
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  • 24
    ISSN: 1572-9745
    Keywords: Biological control ; insects ; pathogens ; germination ; taxonomy ; genetic variability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Pigweeds (Amaranthus spp.) are of economic importance worldwide. In Europe, Amaranthus retroflexus is one of the ten weed species of greatest economic importance. It is a serious problem weed in several field crops (e.g. maize), as well as in vegetables, orchards and grape vines. It is an annual spreading by seeds which have a long viabilityand are dispersed principally by wind and water, but also by machinery. There is great variability in seed germination which renders control with post-emergence herbicides difficult. In addition, triazine herbicide-resistant populations occur in ten European countries. The aim of this subproject of COST action 816 is to investigate the possibilities of classical and inundative biological control of Amaranthus spp., to characterize potentialbiological control agents and to develop methods for their integration with current phytosanitary measures in the target crops. The project was initiated with an extended literaturesurvey followed by field surveys for insects and pathogens associated with Amaranthus spp. in several European countries. Promising isolates of fungal pathogens have been tested ondetached leaves and whole plants, and initial studies on the application of pathogens causing damping off in seedlings have been made. Further, the variability of different provenances ofAmaranthus spp. in response to fungal attack has been investigated
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  • 25
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    Journal of the history of biology 32 (1999), S. 509-555 
    ISSN: 1573-0387
    Keywords: Louis Agassiz ; Spencer Baird ; Charles Girard ; reputation ; taxonomy ; ichthyology ; Museum of Comparative Zoology ; Smithsonian Institution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , History
    Notes: Abstract The reputations of scientists among their contemporaries depend not only on accomplishment, but also on interactions affected by influence and personality. The historical lore of most fields of scientific endeavor preserve these reputations, often through the identification of founders, innovators, and prolific workers whose contributions are considered fundamental to progress in the field. Historians frequently rely on the historical lore of scientists to guide their studies of the development of ideas, exhibiting justifiable caution in reassessing reputations in the light of current knowledge. However, the transmission of historical lore can obscure the relative importance of accomplishment, influence and personality in shaping contemporary reputations, leaving the historian to either accept reputations at face value or attempt to reconstruct the context in which they were created. The science of taxonomy, because of its rules of priority, leaves a relatively accurate record of historical accomplishment through the persistence of taxa in catalogues and faunal guides. These records allow the modern historian an unbiased means to assess the relative accomplishments of historical figures and therefore a means to critically reassess reputations independent of personality and influence. In the historical lore of North American ichthyology, Louis Agassiz at Harvard and Spencer Baird at the Smithsonian emerge as central figures in the early development of the field during the mid-1800s, contributing not only through the quality and quantity of their science, but also through their roles as institutional leaders and mentors to workers who followed. Charles Girard, originally a student of Agassiz's and later a coworker with Baird, receives little notice in the history of ichthyology, and his reputation is that of a minor player in the initial description of the North American fish fauna, and one whose work appears to have been flawed or even careless when compared to his contemporaries. However, a review of both contemporary and modern taxonomic works reveals that Girard's productivity far exceeded that of either Agassiz or Baird. Furthermore, an examination of the tendency of Girard and his contemporaries to introduce synonymous names into the literature, which might reflect careless or uncritical work, suggests that Girard was among the more accomplished workers of hisera, including Agassiz and Baird. Girard's low ranking in the folklore of North American ichthyology, therefore, can not be attributed to discernible shortcomings in his scientific work, but rather to a public and private campaign of criticism waged by Agassiz after Girard's departure from Harvard. While Agassiz's dispute with Girard stemmed from their personal interactions, he expressed them as criticisms of Girard's work, and thus helped shape Girard's scientific reputation as it has been transmitted through the lore of ichthyology. This case study reveals how scientific reputation may not always rest on accomplishment, but can be influenced by personal interactions obscured by time but nonetheless important to history.
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  • 26
    ISSN: 1420-9098
    Keywords: Thaumatomyrmex ; taxonomy ; comparative morphology ; predation ; Polyxenidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We describe, for the first time, the predatory behaviour ofThaumatomyrmex ants on millipedes of the family Polyxenidae, based on field observations ofT. atrox and a field and laboratory study ofT. contumax. The capture of the prey and the removal process of its body-covering setae by the ants before they eat the millipede are described. This specialized behaviour in at least two species of the genus, belonging to two distinct groups of species, indicates a general trend inThaumatomyrmex. We coupled this study with a comparative morphological analysis of the mouthparts and digestive tube of these and otherThaumatomyrmex species. Also, we report the first case of sympatry in the genus, which suggests thatThaumatomyrmex includes several species, and not only one highly variable taxon, as hypothetized earlier.
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  • 27
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    Cellular and molecular life sciences 41 (1985), S. 282-283 
    ISSN: 1420-9071
    Keywords: Hydra ; chromosomes ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A simple method to prepare chromosome spreads of hydra is described. Chromosome counts for a non-symbiotic ‘brown hydra’,Hydra vulgaris attenuata, and the Swiss strain of a symbiotic ‘green hydra’ indicated a diploid number of about 2n=30 in each case. It is suggested that chromosome number may be used to define hydra species more precisely.
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  • 28
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    Cellular and molecular life sciences 43 (1987), S. 355-357 
    ISSN: 1420-9071
    Keywords: Aeromonas ; identification ; taxonomy ; routine
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  • 29
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    Cellular and molecular life sciences 43 (1987), S. 349-350 
    ISSN: 1420-9071
    Keywords: Aeromonas ; taxonomy
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    Topics: Biology , Medicine
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  • 30
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    Cellular and molecular life sciences 49 (1993), S. 1055-1058 
    ISSN: 1420-9071
    Keywords: Moderate halophiles ; taxonomy ; Salinicoccus roseus ; Marinococcus hispanicus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The Gram-positive moderately halophilic cocci validly described up to date areMicrococcus halobius, Sporosarcina halophila, Marinococcus halophilus, Marinococcus albus, Marinococcus hispanicus, and the recently proposedSalinicoccus roseus. Our chemotaxonomic studies on these bacteria have revealed thatMarinococcus hispanicus should be placed in the genusSalinicoccus. DNA-DNA hybridization studies showed that this species should be considered as a separate species ofS. roseus. Thus, we have proposed transferring it to the genusSalinicoccus, asS. hispanicus. Besides, phenotypic and chemotaxonomic features of the culture collection moderate halophilesMicrococcus sp. strains CCM 168 and CCM 1405 indicate that they should be included in the speciesSalinicoccus roseus. The description of this species was based only on one strain.
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  • 31
    ISSN: 1420-9055
    Keywords: Heterotrophic bacteria ; sediments ; taxonomy ; seasonal variations ; aerobic bacterial population ; anaerobic bacterial population ; Lake Lugano (Lago di Lugano)
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    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.
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  • 32
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    Cellular and molecular life sciences 41 (1985), S. 441-446 
    ISSN: 1420-9071
    Keywords: Methanogenic bacteria ; Archaebacteria ; classification ; physiology ; taxonomy
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    Topics: Biology , Medicine
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  • 33
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    Journal of industrial microbiology and biotechnology 17 (1996), S. 328-345 
    ISSN: 1476-5535
    Keywords: hyphomycetes ; ascomycetes ; taxonomy ; ecology ; stream biology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract There are more than 600 species of freshwater fungi with more known from temperate, as compared to tropical regions. These includeca 340 ascomycetes, 300 deuteromycetes, and a number of lower fungi which are not discussed here.Aniptodera, Annulatascus, Massarina, Ophioceras andPseudohalonectria are common freshwater ascomycetes, which appear to be well adapted for this lifestyle either in their ascospore types or their competitive-degradative characters. The most common genera of wood-inhabiting deuteromycetes includeCancellidium, Dactylaria, Dictyosporium andHelicomyces. They are categorized into four groups depending on their form and life style: the ingoldian hyphomycetes; the aero-aquatic hyphomycetes; the terrestrial-aquatic hyphomycetes; and the submerged-aquatic hyphomycetes. The adaptations of aquatic fungi for their dispersal and subsequent attachment to new substrates are discussed.
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  • 34
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    World journal of microbiology and biotechnology 10 (1994), S. 88-92 
    ISSN: 1573-0972
    Keywords: Intelligent screening ; microbial hydroxylation ; multivariate analyses ; taxonomy ; terpenoids
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    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Forty strains of bacteria and 60 of fungi were screened with globulol, 1,8-cineol and cedrol and the strains compared, on the basis of the resulting products, using multivariate analyses. The taxonomic position of the strains is mirrored in their biotransformation capability. Fungi and bacteria, fungal phyla, and Gram-positive and-negative bacteria could all be distinguished in a discriminant analysis using 12 substrates. Hierarchical clustering yielded five groups of strains with distinct biotransformation activity. Such clustering will allow a more efficient screening than before.
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  • 35
    ISSN: 1573-1561
    Keywords: Coleoptera ; Staphylinidae ; Tenebrionidae ; larvae ; defensive glands ; quinone ; naphthoquinone ; taxonomy
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    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The abdominal glands of three bark-inhabiting larvae of generaBolitochara, Leptusa (Staphylinidae), andHypophloeus (Tenebrionidae) were studied chemically and morphologically. Behavior of the larvae indicated that secretion is emitted only after severe disturbance of the larvae. These mechanical contacts may also occur incidentally with coinhabiting nonpredatory arthropods when the beetle larvae move within small interstices under bark. Depending on the species, the secretions contained 1,4-benzoquinone derivatives and three 6-alkyl-naphthoquinones dissolved within various alkanes, alkenes, ethyl-, isopropyl-, and isoamylesters. More erratically distributed gland constituents also detected were acetophenone, benzyl propionate, and methyl hydroxybenzoate. In the laboratory, synthetic quinone-containing solutions simulating those found inLeptusa andBolitochara larvae acted as strong topical irritants and caused further damage to last-stageCalliphora vomitoria larvae if hydrocarbons or esters were used as solvents. The natural secretions ofHypophloeus versipellis elicited considerable mortality in two subcortical sciarid larvae cooccurring with tenebrionid larvae. Bioassay and secretion chemistry of the Staphylinidae/Tenebrionidae larval secretions indicated that they are typical defensive secretions that act topically. Morphological data characterized Bolitocharini larvae as possessing protuberant abdominal tergites supplied with an interiorly situated gland reservoir. After mechanical contact, the defensive secretion is topically applied to other arthropods by dabbing this tergal protuberance on targets. The defensive gland ofHypophloeus versipellis is unusual in possessing a movable reservoir opening situated at the anterior border of tergite IX. By this peculiar gland morphologyHypophloeus larvae are capable of shooting secretion droplets frontally from their slightly depressed dorsal abdominal surface without bending their abdominal tips dorsally. This seems an adaptation to the interstitial habitat of the larvae. The types of defensive glands and their phylogenetic value in Aleocharinae/Tenebrionidae larvae are discussed.
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  • 36
    ISSN: 1573-3017
    Keywords: contamination risks ; fish ; Mississippi River ; ecological factors ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We compared contamination levels in fish from contaminated and uncontaminated floodplain swamps of the lower Mississippi River to assess differences in contamination risks between swamps, across different taxonomic and ecological groupings of fishes within and between swamps, and with seasonality in river stage. Fish tissue levels of inorganic contaminants were substantially lower than environmental levels in both swamps, suggesting either that fish were not uptaking these contaminants, or they were effectively eliminating the contaminants from their bodies. Tissue levels of organic contaminants were high relative to environmental levels, suggesting that these contaminants were bioaccumulating. Organic contaminants were significantly higher in fish from the contaminated swamp (Devil's Swamp) than in fish from a reference swamp up river (Tunica Swamp). Because the organic contaminants were largely confined to sediments, we expected bottom-oriented fishes to have higher concentrations than pelagic fishes. Assuming that uptake was primarily through the food chain, we expected top predators to exhibit higher concentrations than low-level consumers. We also expected year- round swamp residents to exhibit higher accumulations than more transitory users of backswamp habitat. However, organic contaminant levels did not differ in the directions expected for any of these groupings. We did observe differences in organic contaminant levels within and between swamps for different taxonomic groupings of fishes (species and genera). Some taxa occupying low to middle positions in the food web (e.g., gizzard shad, Lepomis spp.) exhibited higher concentrations than taxa near the top of the food web. Within Devil's Swamp, organic contaminant levels were significantly higher at low river stage, when fish were confined to the swamp, than at high river stage, when fish were free to move between the river and the swamp. We caught more species and more fish per unit effort in Devil's Swamp than in Tunica Swamp, contrary to expectations if contaminants in the former were negatively impacting population and community structure. Species richness differences between swamps were a consequence of catch differences, with higher catch corresponding to inclusion of more rare species. The lower catch in Tunica Swamp may have resulted from physical modifications of its waterways to support agriculture and hunting. The results of this study underscore the importance in factoring information on the taxonomy and ecology of organisms, and seasonal changes in environmental conditions, into assessments of contamination risks.
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  • 37
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    Plant molecular biology 21 (1993), S. 363-373 
    ISSN: 1573-5028
    Keywords: eukaryotic ; arbitrary oligonucleotide primer ; PCR ; prokaryotic ; silver staining ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Azolla-Anabaena symbiosis has been used for centuries as a nitrogen biofertilizer in rice paddies. Genetic improvement of the symbiosis has been limited by the difficulty in identifying Azolla-Anabaena accessions and Anabaena azollae strains. The recently developed technique of DNA amplification fingerprinting (DAF) was applied to this problem. DAF uses single, short, oligonucleotide primers of arbitrary sequence to direct amplification of a characteristic set of DNA products by a thermostable DNA polymerase in a thermocycling reaction. The products are separated in polyacrylamide gels and detected by silver staining. DAF could easily distinguish and positively identify accessions of Azolla-Anabaena with DNA extracted from the intact symbioses. The contribution of prokaryotic Anabaena sequences to the fingerprint of the intact symbioses, however, ranged from 0 to 77%, depending on the primer sequence. Therefore, DNA extracted from the intact symbioses would not be suitable for Azolla taxonomy studies. The fingerprints of Anabaena strains isolated by sucrose gradient centrifugation from different species of Azolla could be easily distinguished, and DAF patterns were used to confirm the maternal pattern of transmission of Anabaena in a sexual hybrid. Template DNA extracted from roots was used to produce fingerprints for Azolla without interference from the microsymbiont. Comparison of the patterns from the parents and a hybrid gave strong evidence confirming sexual hybridization.
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  • 38
    ISSN: 1871-4528
    Keywords: collecting expedition ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A joint Argentina/United States expedition collected wild potato (Solanum sect.Petota) germplasm in Argentina between February 4–28 and March 28–April 18, 1990. This was followed by a short expedition between February 27 and March 3, 1991. Collections were made in the Andes Mountains from southern Tucumán Province (27°20′S), south to southern Rio Negro Province (40°52′S) and comprised 88 lots of germplasm of ten species, 76 as true-seed and 12 as tubers. The most important new collections included germplasm ofS. brevidens, S. maglia, S. x rechei andS. venturii. By summarizing details of these collections with those of existing collections, we have been able to suggest future collecting in Argentina.
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  • 39
    ISSN: 1871-4528
    Keywords: subspecies ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A joint Mexico/United States expedition collected wild potato (Solanum sect.Petota) germplasm in Mexico between August 1–31, 1993. The purpose of the expedition was to expand germplasm and herbarium collections ofS. bulbocastanum andS. cardiophyllum. Collections were made from west-central to southern Mexico, and comprised 19 true seed and 37 tuber collections (45 collections in total) of 9 species and two putative natural hybrids.
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  • 40
    ISSN: 1618-2545
    Keywords: Bruguiera gymnorrhiza ; ecology ; Lanceispora amphibia ; mangrove ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lanceispora amphibia gen. et sp. nov. in the Amphisphaeriaceae is described from senescent and fallen leaves ofBruguiera gymnorrhiza in mangrove forests in the Southwest Islands, Japan. The fungus produces immersed ascomata in leaf tissue, cylindrical asci with an apical ring staining blue with iodine, and oblanceolate ascospores with a septum above the middle. Studies on the fungal succession on the mangrove leaves revealed thatL. amphibia infects senescent leaves on the tree and inhabits intertidal fallen leaves, showing the highest frequency of occurrence at the late stage of decomposition. In culture the optimal conditions for hyphal growth were 20 ppt salinity and 30°C, and those for sexual reproduction were 10 ppt salinity and 25°C. Growth at 0 ppt (fresh water) was depressed. The fungus has amphibious habits, growing on the tree and in intertidal water; and it is adapted to the high osmotic conditions in leaf tissues of the mangrove tree and to the subtropical, brackish water environment of mangrove forests.
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  • 41
    ISSN: 1618-2545
    Keywords: Bauhinus ; Microbotryum ; taxonomy ; Ustilago ; ustomycetes
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    Topics: Biology
    Notes: Abstract A study of the type specimen ofUstilago jehudana resulted in the correction of the diagnosis. The sori are localized in the host gynoecium but not in the anthers. Morphological characters of the sori and ustospores of the later describedU. moenchiae-manticae are identical with these ofU. jehudana. Ustilago moenchiae-manticae is reduced here to a synonym ofU. jehudana. The smut is reported as new to Bulgaria on a new host, viz.,Moenchia erecta. A new combination,Bauhinus jehudanus, is proposed.
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  • 42
    ISSN: 1618-2545
    Keywords: Aphyllophorales ; ribosomalDNA ; synnematous hyphomycete ; taxonomy ; Tretopileus sphaerophorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tretopileus sphaerophorus, a synnematous hyphomycete with basidiomycetous affinities was newly isolated from the decaying petiole and peduncle ofCocos nucifera collected in Depok, Indonesia. The species produced first a bulbil as a propagule on the top of a synnema. After the bulbil had fallen, the synnema proliferated about seven times to produce new bulbils, each time making conspicuous nodes at the upper part. By careful morphological observation, clamp connections were confirmed on the hyphae in the specimens and culture. In culture, each hyphal cell with or without a clamp was found to be dikaryotic by DAPI nuclear staining. Germination of the bulbils occurred first from projecting hyphal tips on their upper surface, which have been treated as germ pores. The inner structure of the bulbils, the hyaline mucus of the bulbils, and conidium-like hyphal fragments were also examined. Phylogenetically,T. sphaerophorus was inferred to be related to the Aphyllophorales based on the nuclear encoded small subunit (18S) rDNA using the homology search system (FASTA) and the neighbour-joining method.
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  • 43
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    Mycoscience 39 (1998), S. 97-104 
    ISSN: 1618-2545
    Keywords: Loculoascomycetes ; phyllachoraceae ; phyllachorales ; taxonomy
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    Topics: Biology
    Notes: Abstract The order Phyllachorales contains ascomycetous fungi of considerable economic importance. The group is represented mostly by foliar parasites which produce perithecia under a clypeus, inside a stroma, or do not produce any stromatic tissue. A major taxonomic problem with this order is the lack of reliable morphological characters that clearly delimit the entire group. The main purpose of this review is to provide a clear picture of the taxonomic relationships of the order Phyllachorales, along with a key to the most important genera in the family Phyllachoraceae.
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  • 44
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    Mycoscience 40 (1999), S. 73-80 
    ISSN: 1618-2545
    Keywords: Mycena auricoma ; Mycena sect.Radiatae ; Mycena spinosissima ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two lignicolous species ofMycena (Agaricales, Basidiomycetes) are described and illustrated from eastern, Japan:Mycena auricoma sp. nov., forming ephemeral coprinoid basidiomata and belonging to sectionRadiatae, was found on a dead fallen twig ofQuercus serrata. It appears to close to a Malaysian species,“Trogia” crinipelliformis. Mycena spinosissima in sectionSacchariferae, new to Japan, was collected from dead bark ofAphananthe aspera, a dead fallen inflorescence ofCryptomeria japonica, and a dead fallen twig ofQuercus serrata.
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  • 45
    ISSN: 1618-2545
    Keywords: cellular slime molds ; dictyostelids ; macrocyst ; mating system ; taxonomy
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    Topics: Biology
    Notes: Abstract Macrocyst formation in the sexual cycle was found in three dictyostelid species:Dictyostelium monochasioides, Polysphondylium candidum, andP. pseudo-candidum. Mating tests suggested thatD. monochasioides andP. pseudocandidum were heterothallic andP. candidum was homothallic. The primary walls of macrocysts had partially or fully degenerated, while the inner walls, believed to be tertiary walls, showed an undulate structure.
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  • 46
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    Mycoscience 35 (1994), S. 125-129 
    ISSN: 1618-2545
    Keywords: rust fungus ; taxonomy ; Puccinia tarennicola ; Uredinales ; Uredo daphniphylli ; Uredo pipturi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three species of rust fungi were reported based on the specimens collected in the islands of the Yaeyama group and Okinawa, Japan.Puccinia tarennicola onTarenna gracilipes andUredo daphniphylli onDaphniphyllum teijsmannii were described as new species.Villebrunea frutescens was added to the host plants ofUredo pipturi.
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  • 47
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    Mycoscience 36 (1995), S. 431-438 
    ISSN: 1618-2545
    Keywords: Atkinsiella dubia ; Halocrusticida ; Japan ; marine fungus ; taxonomy
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    Topics: Biology
    Notes: Abstract Atkinsiella dubia, isolated from the mantle of abalone (Haliotis sieboldii), is described and illustrated as a new record from Japan. The fungus was also obtained from the gills of swimming crab (Portunus trituberculatus). Six other species of the genusAtkinsiella have hitherto been reported from various aquatic animals. The fungus is distinguished from the other six species by the morphology of its mycelia and the process of zoospore production. The most distinctive feature is that zoospores in the first motile stage ofA. dubia encyst in zoosporangia, unlike the other species. We therefore proposeHalocrusticida gen. nov. (Lagenidiales, Haliphthoraceae) for the other six species ofAtkinsiella. A key to species of the genusHalocrusticida is provided.
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  • 48
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    Mycoscience 37 (1996), S. 173-185 
    ISSN: 1618-2545
    Keywords: Geminago ; Geminago nonveilleri ; Mycosyrinx ; taxonomy ; Ustilaginales
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The revision of the genusMycosyrinx resulted in the recognition of three species, all on Vitaceae:M. cissi (type onCissus sicyoides), M. arabica (type onCissus quadrangularis), andM. microspora (type onCissus afzelii), and in the description of a new genus. After a short historical review, the genusMycosyrinx is characterized and descriptions, synonyms, ilustrations, and a key are given for the three recognizedMycosyrinx species.Mycosyrinx globosa (nomen nudum, onCissus sp.) is considered to be immatureM. microspora. Lectotype is selected forSchizonella colemani (=M. arabica). A short characterization is given for the generaSchizonella andUstacystis and they are compared withMycosyrinx andSchroeteria. ForM. nonveilleri (type onTriplochiton scleroxylon, Sterculiaceae) a new genus,Geminago, is proposed. A key to the pair-spored genera of Ustilaginales is given.Mycosyrinx osmundae (type onOsmunda regalis, Pteridophyta, Osmundaceae) and its var.cinnamomae are excluded fromMycosyrinx.
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  • 49
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    Mycoscience 37 (1996), S. 255-259 
    ISSN: 1618-2545
    Keywords: cleistothecial ascomycete ; Lasiobolidium gracile ; soil fungus ; taxonomy ; USA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lasiobolidium gracile isolated from a soil sample collected from California, USA is described as a new species. This species is characterized by yellowish brown to reddish brown, nonostiolate ascomata with numerous, long straight appendages and a translucent peridium, subglobose to broadly clavate asci, hyaline to pale yellowish brown, ellipsoidal ascospores. It differs from the other species ofLasiobolidium in the straight and narrow appendages and the large ascospores. A key is presented separating the seven known species.
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  • 50
    ISSN: 1618-2545
    Keywords: Chaetomidium ; Chaetomidium heterotrichum ; cladistic analysis ; systematics ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A species of the genusChaetomidium was isolated from fallen leaves of an unknown tree during a mycofloral survey of materials from the ‘Gran Sabana’ region in Southeastern Venezuela. The species was identified asC. heterotrichum. Identification was based on the perithecium lacking a neck and ostiole, the peridium being composed of textura angularis cells, the perithecium being covered with hairs and setae at the apex, and by 4-spored asci containing uniporate ascospores. The anamorph was intermediate betweenChalara andAcremonium sect.Chaetomioides. This is the first report of this species in Venezuela and only the second timeC. heterotrichum has been found. An illustrated description ofC. heterotrichum and a key to eight recognized species ofChaetomidium, based on morphological characters in the literature, are provided. The results of a cladistic analysis of 12 available morphological characters of the genus revealed two main groups, each based on the two characters ‘ascospore shape’ and ‘peridial wall type’. The ascomatal hairs had little influence on the species grouping. With the exception ofC. heterotrichum, the remaining species ofChaetomidium were monophyletically supported in 73% of the bootstrap replicates.Chaetomidium heterotrichum was the basal ingroup taxon and formed a sister group to the other species in the genus.
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    Mycoscience 38 (1997), S. 55-69 
    ISSN: 1618-2545
    Keywords: discomycetes ; ITS rDNA phylogeny ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The systematics ofScleromitrula andVerpatinia of the family Sclerotiniaceae is reevaluated on the basis of morphological, cultural and molecular criteria.Scleromitrula shiraiana, Verpatinia species andCiborinia candolleana share gross morphological, microanatomical and cultural features which clearly distinguish them from the closely relatedCiborinia andRutstroemia species. Phylogenetic analyses of sequences from the internal transcribed spacer region (ITS1, ITS2, and the 5.8S gene) of nuclear ribosomal DNA demonstrate that the stipitate-capitate specimens ofScleromitrula andVerpatinia species plus the stipitate-cupulateCiborinia candolleana constitute a monophyletic clade separate from a clade including the type species ofCiborinia. Scleromitrula is emended to includeS. shiraiana, the new speciesS. rubicola, C. candolleana, and specimens formerly assigned toVerpatinia. A key to the accepted species ofScleromitrula is provided.
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    Mycoscience 38 (1997), S. 71-73 
    ISSN: 1618-2545
    Keywords: Ceratobasidiaceae ; Japan ; taxonomy ; Ypsilonidium bananisporum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ypsilonidium bananisporum sp. nov. belonging to Ceratobasidiales is described and illustrated. This fungus has all the characteristics of the genusYpsilonidium including reticulate-hypochnoid basidiomes, broad hyphae branching at right angles, broadly clavate basidia with two sterigmata, and basidiospores germinating by repetition. It differs from all hitherto known species in the genus by producing suballantoid to banana-shaped basidiospores, measuring 19.5–22×5.5–6 μm.
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  • 53
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    Mycoscience 38 (1997), S. 87-89 
    ISSN: 1618-2545
    Keywords: Israel ; Mycomycetes ; Physarales ; Stemonitales ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ten taxa of myxomycetes growing mainly withEucalyptus, oak and pine are described. They were found in Upper Galilee, Mt. Carmel and Central parts of the country and all are new to Israel.
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  • 54
    ISSN: 1618-2545
    Keywords: hyphomycetes ; identification ; taxonomy ; Tuberculariaceae ; Tuberculariales
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mycoleptodiscus terrestris from black pepper roots in the Dominican Republic is described together with some notes and photomicrographs.
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  • 55
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    Mycoscience 38 (1997), S. 429-431 
    ISSN: 1618-2545
    Keywords: coelomycete ; Japan ; Microsphaeropsis rugospora ; soil fungus ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Abstract In an exploratory survey of soil-borne mitosporic fungi as producers of secondary metabolites useful to the pharmaceutical industry, a pale yellow pycnidial coelomycete was encountered and isolated on potato-dextrose agar. The fungus was characterized as follows: rapid growth on common media, conidiomata which are non-pulvinate, semi-immersed to immersed, nearly globose, glabrous, with a slightly papillate ostiole; pale yellowish brown, translucent, membranaceous peridium; discrete, ampulliform, monophialidic conidiogenous cells; and onecelled, dark brown, globose, thick-walled, rugose conidia which germinate very easily. In accordance with this profile, our isolate is included in the genusMicrosphaeropsis Höhnel. (Morgan-Jones, 1974a, b; Sutton, 1977, 1980; Morgan-Jones and White, 1987; Heiny et al., 1992; Katumoto, 1992). However, it proved to be sufficiently different from all described species ofMicrosphaeropsis to warrant its description as a new species.
    Notes: Abstract A new species ofMicrosphaeropsis (Sphaeropsidales, Coelomycetes),M. rugospora, is described and illustrated. This fungus is characterized by its rapid growth on common media such as oatmeal and potato-carrot agars; semi-immersed to immersed, nearly globose, papillate pycnidias; pale yellowish brown, translucent, membranaceous peridium; monophialidic, ampulliform conidiogenous cells; and one-celled, dark brown, globose conidia ornamented with distinct tubercles. The holotype was isolated from the cultivated soil in Tanegashima Island, southern Japan.
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    Mycoscience 39 (1998), S. 31-36 
    ISSN: 1618-2545
    Keywords: Mycogloea ; Platygloea ; Platygloeaceae ; Platygloeales ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three new species ofMycogloea are described and illustrated; they are:M. amethystina from Canada,M. nipponica, from Japan, andM. bullata from Thailand.Mycogloea tahitiensis is reported from Japan and additional undescribed taxa in the genus are briefly noted. Some characteristics of the genus are discussed, and a key is provided for six species recognized at this time.
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    Mycoscience 40 (1999), S. 189-191 
    ISSN: 1618-2545
    Keywords: bamboo fungus ; hyperparasitism ; hyphomycetes ; mycoparasites ; taxonomy
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    Topics: Biology
    Notes: Abstract Cryptophiale sphaerospora sp. nov. is described and illustrated based on a single collection attached to a synnematous fungus,Janetia synnematosa, from a dead bamboo culm. It differs from other species ofCryptophiala in having spherical to subspherical conidia and a cerebroid layer of phialides. The overall morohology of this species is smaller than that of previously described species.
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    Plant systematics and evolution 160 (1988), S. 181-188 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Ranunculaceae ; Helleborus viridis subsp.viridis and subsp.occidentalis ; H. odorus subsp.laxus. ; Range of distribution ; taxonomy ; Flora of Northern Italy
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    Notes: Abstract The taxon commonly namedHelleborus viridis in Lombardy (NW. Italy) differs from both, subsp.viridis and subsp.occidentalis, and is shown to fall within the variation range ofH. odorus subsp.laxus which has been reported so far for NE. Italy only. TrueH. viridis within Italy grows only in the Maritime Alps.
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  • 59
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    Keywords: Cyanophyta ; Cyanophyceae ; Nostocales ; Nostocaceae ; Aphanizomenon ; Anabaena ; Morphology ; morphometry ; variation ; trichome structure ; taxonomy
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    Topics: Biology
    Notes: Abstract The dimension and variation range of terminal and intercalary cells, heterocysts, and akinetes of fourAphanizomenon taxa occurring in Czechoslovakia were studied. Statistical and graphical procedures were used for evaluation. With regard toA. flos-aquae, the results support the distinction of two varieties (var.flos-aquae and var.klebahnii). In the samples determined asA. gracile two clearly distinguishable morphological types could be found; one of them is recognized as a new species:A. flexuosum. Its diacritical features are established and problems of the intrageneric taxonomy ofAphanizomenon and its demarcation from the genusAnabaena are discussed.
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    Plant systematics and evolution 168 (1989), S. 123-141 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Liliiflorae ; Liliales ; Dioscoreales ; Asparagales ; Cladistics ; relationships ; taxonomy
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    Notes: Abstract Comparisons between previous intuitive or phenetic classifications of the netveinedLiliiflorae was used to determine a suitable group of taxa for cladistic analyses. The resultant 48 genera and generic groupings comprising 19 families from within theAsparagales, Liliales andDioscoreales were then analysed. The cladistics largely supported previous treatments, with theLiliales, Dioscoreales andAsparagales all monophyletic.
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    Plant systematics and evolution 191 (1994), S. 161-170 
    ISSN: 1615-6110
    Keywords: Poaceae ; Puccinellia ; Pollen maximum diameter ; pollen fertility ; taxonomy ; Flora of the Iberian Peninsula
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    Notes: Abstract Diameter and fertility of pollen grains were surveyed in nine species ofPuccinellia Parl. (Poaceae), mainly from the Iberian Peninsula, allowing information about reproductive behaviour and biological characteristics of pollen of these taxa. Maximum diameter was measured with an image processor and fertility was evaluated by staining the grains with Müntzing's mixture. Significant differences in both characters were found between the taxa. In consequence, maximum diameter and fertility proved to have some taxonomic relevance inPuccinellia.
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    Plant systematics and evolution 191 (1994), S. 213-226 
    ISSN: 1615-6110
    Keywords: Poaceae ; Hordeum ; Isoenzymes ; taxonomy ; phylogenetic species ; sibling species
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    Topics: Biology
    Notes: Abstract Morphological differentiation of diploid accessions ofHordeum marinum Huds. s.l. into two varieties, var.marinum and var.fouilladei (Rouy)Nevski is associated with isoenzyme differentiation. The tetraploid form ofH. marinum s.l. exhibited fixed heterozygosity of several heterozymes with one homoeozyme shared with var.fouilladei and the second homoeozyme not found in the two diploids. It also differed from both diploids in the mobility of glucose-6-phosphate dehydrogenase. All three taxa differed in morphs of EST-A. It is concluded that the tetraploid is an allopolyploid with one genome closely related to the diploid var.fouilladei and with the second genome divergent from those of both diploids by genes for unique morphs of eight homoeozymes. On the basis of the isoenzyme data, three phylogenetic sibling species—H. marinum Huds. s.str. (2x),H. geniculatum All. s.str. (= var.fouilladei, 2x), andH. caudatum Jaaska, spec. nova (4x), are proposed within theH. marinum s.l. complex and a key is given.
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    Plant systematics and evolution 191 (1994), S. 227-236 
    ISSN: 1615-6110
    Keywords: Lichenized fungi ; Lecanoraceae ; Lecanora epibryon ; L. subimmersa ; Chemotaxonomy ; biogeography ; taxonomy ; xanthones
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    Topics: Biology
    Notes: Abstract The chemical variation inLecanora epibryon andL. subimmersa, two species of theL. subfusca group, has been examined. In both species the chemical differences are correlated with geographical distribution, but not with morphological differences. As a consequence the chemotypes are recognized at subspecific level. InL. epibryon three chemical races are segregated according to the various chemosyndromes present. Subspeciesepibryon, containing atranorin and triterpenoids, occurs in the northern hemisphere and South America, while the other two subspecies occur only in the southern hemisphere. The subsp.broccha (Nyl.)Lumbsch, comb. nova, contains atranorin, the stictic acid and the 2,5,7-trichloro-3-O-methylnorlichexanthone chemosyndromes, while subsp.xanthophora Lumbsch, subsp. nova, is similar but lacks the stictic acid chemosyndrome. Two chemical races occur in the pantropical speciesL. subimmersa. While subsp.subimmersa contains atranorin and zeorin, subsp.ramboldii Lumbsch & Elix, subsp. nova, contains an additional ten chlorinated xanthones.L. impressa is reduced to synonymy toL. subimmersa.
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    Plant systematics and evolution 191 (1994), S. 247-263 
    ISSN: 1615-6110
    Keywords: Asteraceae ; Senecioneae ; Blennospermatinae ; Ischnea ; Revision ; taxonomy
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    Notes: Abstract The endemic New Guinean genusIschnea F. Muell. (Asteraceae, Senecioneae, Blennospermatinae) is revised and four species are recognized. Characters of special interest are tubeless ray florets, male disc florets, and secretory spaces in leaves. A principal component analysis is made on theIschnea elachoglossa F. Muell. complex which shows great variation. One new species,I. capellana Swenson, from the Star Mountains, is described. A key, illustrations, and distribution maps to all species are supplied.
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    Plant systematics and evolution 192 (1994), S. 11-29 
    ISSN: 1615-6110
    Keywords: Hamamelidae ; Juglandaceae ; rbcL ; phylogeny ; taxonomy
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    Topics: Biology
    Notes: Abstract A cladistic analysis of molecular data from the chloroplast generbcL was used to examine the taxonomic relationships of the walnut family (Juglandaceae). In addition, chemical and morphological data from a previous study byHufford (1992) were incorporated, expanded, and analyzed independently and in combination with the molecular data. The results of these analyses suggest that theJuglandaceae are more closely related to theFagaceae, Betulaceae, Casuarinaceae, andUrticaceae and their relatives (sensuCronquist 1981) than they are to theAnacardiaceae (sensuThorne 1983). However, sequence data fromrbcL also suggest a relationship between the higherHamamelidae and certain families in theRosidae sensuCronquist 1981 (such asRosaceae andRhamnaceae), an outcome which would add credence to the widely accepted view of the polyphyletic nature of theHamamelidae.
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    Plant systematics and evolution 193 (1994), S. 115-123 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Strelitzia ; Heliconia ; Typha ; Benincasa ; Epicuticular wax ; wax ultrastructure ; wax chemistry ; systematics ; taxonomy
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    Notes: Abstract Certain non-liliiflorous taxa within the monocotyledons (e.g.,Strelitzia, Heliconia, Typha) are characterized by compound epicuticular wax rodlets (Strelitzia type). Similar rodlets are also encountered on the surface of the dicotyledonous plantBenincasa hispida (Thunb.)Cogn. Chemical analysis of the surface wax from both sources showed that the rodlets are chemically distinct. The rodlets of the monocotyledons consist exclusively of aliphatic wax lipids, mainly wax esters. In contrast, the rodlets ofBenincasa are cheifly composed of triterpenol acetates and triterpenols. Formation of rodlets is therefore interpreted as ultrastructural convergency. It is concluded that taxonomical studies on wax crystalloids can be misleading when interpreted in terms of micromorphology of crystalloids only.
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    Plant systematics and evolution 163 (1989), S. 93-105 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Leguminosae (Fabaceae) ; Caesalpinioideae (Caesalpiniaceae) ; Cassia ; Chamaecrista ; Senna ; Stigma morphology ; taxonomy ; floral ecology
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    Notes: Abstract Two stigma forms occur inChamaecrista andSenna, but only one inCassia. In the common chambered form, a stigma pore is positioned on the reflexed style tip and is the entrance to a tapering chamber. The pore rim is fringed by hairs which vary in number, size, distribution and shape. In the alternative form the stigma is situated at the apex of the curved style and is crateriform. The crater rim is fringed by hairs of variable number and shape. The stigmatic hairs are predominantly unicellular and cutinized. Stigma and hair differences aid in the taxonomy of the genera. Their functions in pollination biology are discussed.
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    Plant systematics and evolution 163 (1989), S. 153-163 
    ISSN: 1615-6110
    Keywords: Algae ; Dinophyceae ; Gymnodiniales ; Gymnodiniaceae ; Symbiodinium ; S. microadriaticum subsp.condylactis ; subsp. nov. ; DNA ; hybridization ; karyotypes ; phenotypes ; symbiosis ; taxonomy ; zooxanthellae
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    Notes: Abstract Relationship among symbiotic dinoflagellates of the genusSymbiodinium derived from seven different host species has been studied by means of DNA/DNA hybridization. DNA homologies range from about 70 to 30%D. Highest homology is regarded as subspecific level. Based on the characteristics of DNA and phenotypes,Symbiodinium microadriaticum subsp.microadriaticum is separated fromSymbiodinium microadriaticum subsp.condylactis. Lowest homology occurs at the methodical background, and is similar to that obtained with DNA of algae belonging to different classes. The data are in excellent agreement with DNA base composition, karyotypes, and morpohological as well as biochemical markers, emphasizing speciation among these gymnodinioid zooxanthellae.
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    Plant systematics and evolution 163 (1989), S. 165-176 
    ISSN: 1615-6110
    Keywords: Algae ; Chlorarachniophyta ; Cryptochlora perforans ; Biology ; taxonomy ; phylogeny ; inter-specific relationships
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    Notes: Abstract The life cycle ofCryptochlora perforans is described under culture conditions, including the following stages: Naked and walled amoebae, cysts, coccoid, palmelloid and flagellate stages. Phagotrophy of living diatoms, movement and reproduction are documented. Amoebae ofCryptochlora are chemotactically attracted by damaged algal filaments, perforate and penetrate such filaments, and subsequently engulf part of their contents. A comparison is made with a culture ofChlorarachnion reptans Geitler, according to earlier and own observations. Chloroplast structure as well as zoospore morphology confirm close affinities betweenCryptochlora andChlorarachnion. Generic characters as well as possible phylogenetic affinities with amoeboidXanthophyta andProtozoa are discussed.
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    Plant systematics and evolution 182 (1992), S. 149-227 
    ISSN: 1615-6110
    Keywords: Asteraceae ; Heliantheae ; Blepharispermum ; Revision ; taxonomy ; phylogeny ; cladistics
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    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.
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    Plant systematics and evolution 153 (1986), S. 205-222 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Geraniaceae ; Pelargonium ; Chromosome numbers ; karyotypes ; hybrids ; karyotype evolution ; taxonomy
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    Notes: Abstract The chromosome numbers of seven species ofPelargonium sect.Eumorpha have been determined from material of known wild origin, and karyotypic comparisons have been made. Within the section there is variation in basic chromosome number (x = 4, 8, 9, 11), variation in chromosome size, and two species have polyploid races. The three species with chromosome numbers based on x = 11 have the smallest chromosomes (1.0–1.5 µm); chromosomes are larger (1.0–3.0 µm) in the other species.P. elongatum has the lowest chromosome number in the genus (2n = 8).P. alchemilloides is exceptional in that it has four cytotypes, 2n = 16, 18, 34 and 36, and the form with 2n = 36 has large chromosomes (2.0–5.0 µm). Evidence from a synthesized hybrid suggests thatP. alchemilloides with 2n = 16 may be of polyploid origin. The three species based on x = 11 appear to be more closely related to species from other sections ofPelargonium that have the same basic chromosome number and small chromosome size, rather than to other species of sect.Eumorpha.
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    Plant systematics and evolution 154 (1986), S. 79-88 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Onagraceae ; Oenothera sect ; Oenothera subsect ; Oenothera ; Oe. wolfii ; Chromosomal analysis ; plastid analysis ; complexheterozygosity ; taxonomy
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    Notes: Abstract Oenothera wolfii, endemic in coastal Northern California and Southern Oregon, has been analysed cytogenetically. It is a permanent structural heterozygote composed of two nearly identical genomic complexes which are closely related to the neighboring maritime ecotype of the homozygousOe. elata subsp.hookeri. — Oe wolfii is believed to have evolved recently from its homozygous ancestor by the accumulation of reciprocal translocations and the acquisition of balanced lethals. Forms such asOe. wolfii represent an important connecting link in our understanding of the evolution of the complexheterozygous species ofOenothera.
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    Plant systematics and evolution 158 (1987), S. 37-46 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Leguminosae ; Glycine spp. ; Genome ; adventitious roots ; pod ; taxonomy
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    Notes: Abstract Adventitious roots were observed on 3 wild perennialGlycine species, in short-poddedG. clandestina, G. latifolia and mostG. tabacina (2x, 4x, 6x), while other species lacked adventitious roots. This suggests that the adventitious roots trait is associated with B genome species. Intra- and interspecific F1 hybrids reveal that adventitious roots apparently are inherited recessively. The presence of adventitious roots or short-poddedG. clandestina, coupled with infertility with longer-poddedG. clandestina, and enzymatic and leaflet morphology differences between the twoG. clandestina subgroups, supports segregation of the short-podded form as a separate taxon.
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    Keywords: Chlorophyceae ; Chlamydomonadales ; Spermatozopsis exsultans ; Green flagellate ; ultrastructure ; absolute configuration ; taxonomy ; phylogeny
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    Notes: Abstract The green flagellateSpermatozopsis exsultans Korshikov has been studied in culture by light and electron microscopy. The organism is naked, bears four flagella and is conspicuously spirally twisted. The ultrastructure and location of cell organelles (except the flagellar apparatus) has been investigated in detail using an absolute configuration analysis. With the exception of a doubling of the flagella and of the secondary cytoskeletal microtubule system,S. exsultans has the exact same complement of organelles occupying the same relative positions as has been described forS. similis. The two species are therefore correctly placed in the same genus. The usefulness of absolute orientations of cell organelles for green algal taxonomy and phylogeny is stressed.
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    Plant systematics and evolution 159 (1988), S. 107-121 
    ISSN: 1615-6110
    Keywords: Fungi ; Basidiomycetes ; Agaricales ; Bolbitiaceae ; Conocybe ; New taxa ; keys ; taxonomy ; Nature preserve Lobau ; mycoflora of Austria
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    Notes: Abstract The mycological exploration of the Viennese nature preserve Lobau, resulted in the discovery of several new species ofBasidiomycetes; of special interest is the genusConocybe of which the authors present two new taxa:C. lobauensis andC. leporina var.tetraspora. FurthermoreC. neoantipus, C. striatipes andC. caespitosa are discussed, and the new varietiesC. neoantipus var.tucumana and var.carinthiaca as well asC. striatipes var.sejuncta are proposed.
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    Plant systematics and evolution 161 (1988), S. 71-85 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Caryophyllales ; Centrospermae ; Cuticle ; micromorphology ; scanning electron microscopy ; systematics ; taxonomy ; wax
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    Notes: Abstract Epidermal surfaces of about 500 species from some 250 genera of centrospermous families plus some possibly related families were examined by scanning electron microscopy. The micromorphology of their epicuticular waxes is described under taxonomic aspects. In general, Centrosperms tend to develop wax platelets on their cuticle. Shape and size of these platelets are highly diverse, but specific for some taxa. Particular forms of rodlets and thick wax plates occur only in few taxa. The systematic and taxonomic applicability of wax micromorphology is limited, but tentatively family characterizations are given. The data presented provide additional information concerning the familiar and suprafamiliar classification ofCaryophyllales.
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    Plant systematics and evolution 198 (1995), S. 179-194 
    ISSN: 1615-6110
    Keywords: Fabaceae ; Vicia sect.Faba ; Electrophoresis ; seed albumins ; taxonomy
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    Notes: Abstract Electrophoretic analysis of seed albumins (PAGE) covered 173 accessions representing nine species ofVicia sect.Faba. The number of albumin bands recorded in particular species varied from three inV. eristaloides to 23 inV. faba; in total, 38 bands were distinguished in the investigated material. The examined species, exceptV. eristalioides, showed intraspecific variation with respect to the number and relative staining intensity of albumin bands; individual variation was especially marked inV. faba and inV. narbonensis. Hierarchical clustering of the investigated taxa was based onBhattacharyya distances calculated from the electrophoretic data. The taxa grouped in three main clusters.Vicia faba and the rather remotely relatedV. kalakhensis formed one cluster. The second cluster was composed ofV. narbonensis distantly related toV. hyaeniscyamus. The third cluster comprised three subgroups: 1.V. johannis, V. galilaea andV. serratifolia, 2.V. eristalioides, and 3.V. bithynica. The obtained results are discussed with reference to taxonomic relationships inVicia sect.Faba.
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    Plant systematics and evolution 199 (1996), S. 109-120 
    ISSN: 1615-6110
    Keywords: Lamiaceae ; Scutellaria sect.Resinosa ; SEM ; nutlet sculpturing ; micromorphology ; taxonomy
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    Notes: Abstract Nutlet sculpturing of 22 taxa ofScutellaria sect.Resinosa, representing 18 of its 19 species, and the monotypic genusSalazaria was studied by scanning electron microscopy (SEM). The nutlets of sect.Resinosa, while remarkably variable among themselves, differed from hypothetically closely related sections in lacking circumferential banding and sessile glands. Species could be grouped by surface sculpturing into seemingly meaningful phenetic clusters.Scutellaria potosina var.platyphylla was sufficiently distinct micromorphically so as to be elevated to specific status asScutellaria platyphylla comb. and stat. nov. The significance of nutlet microcharacters within sect.Resinosa is discussed, especially as compared to closely related sections. The genusSalazaria had nutlet sculpturing quite different from all taxa belonging to sect.Resinosa.
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    Plant systematics and evolution 199 (1996), S. 243-258 
    ISSN: 1615-6110
    Keywords: Eriocaulaceae ; Leiothrix crassifolia (L. nubigena, L. obtusifolia) ; Morphological and anatomical variation ; geographical differentiation ; taxonomy ; Flora of ‘campos rupestres’ ; Brazil
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    Notes: Abstract The morphological and anatomical leaf and scape differentiation ofLeiothrix crassifolia is analysed and classified into seven types (I, II, III, IV, V, VI, VII). The species has a relatively wide distribution in the campo rupestre of Minas Gerais in Brazil. Variation in the isolated populations on different mountain ranges is complex, does not follow a clear geographical pattern, and defies taxonomic classification.L. nubigena andL. obtusifolia are included inL. crassifolia.
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    Plant systematics and evolution 180 (1992), S. 1-13 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Elymus ; Genome analysis ; morphology ; taxonomy
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    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.
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    Plant systematics and evolution 180 (1992), S. 221-225 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Acanthaceae ; Ruellia ; Speciation over short distances ; endemism ; taxonomy ; Flora of Mexico
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    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.
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    Plant systematics and evolution 181 (1992), S. 143-169 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rubiaceae ; Tocoyena ; Hybridization ; differentiation ; speciation ; homogamic complex ; tropical woody plants ; taxonomy ; Flora of South America
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    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.
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    Plant systematics and evolution 181 (1992), S. 217-226 
    ISSN: 1615-6110
    Keywords: Diatoms ; plankton ; Chaetoceros ; New species ; morphology ; taxonomy
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    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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  • 84
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    Plant systematics and evolution 181 (1992), S. 255-260 
    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
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    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.
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  • 85
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    Plant systematics and evolution 184 (1993), S. 207-231 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Ericales ; Cladistics ; phylogeny ; taxonomy
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    Notes: Abstract A cladistic analysis of theEricales based on morphological, anatomical, embryological, and phytochemical data has been undertaken. Resulting from the analysis, 56 equally parsimonious cladograms were obtained. The tribeEnkiantheae was found to be the sister-group of the rest of theEricaceae, in which theEmpetraceae, theEpacridaceae, Pyrolaceae, andMonotropaceae are forming derived ingroups. It is thus concluded that theEricaceae are a paraphyletic assemblage as presently circumscribed, and thatEmpetraceae andEpacridaceae are better treated as members of theEricaceae.
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  • 86
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    Plant systematics and evolution 185 (1993), S. 17-33 
    ISSN: 1615-6110
    Keywords: Pyrenocarpous lichens ; Verrucariaceae ; Catapyrenium ; Dermatocarpon ; Catapyrenium analogicum spec. nova ; C. andicolum spec. nova ; C. chilense comb. nov. ; C. corticolum comb. nov. ; C. exaratum spec. nova ; C. lachneoides spec. nova ; C. podolepis spec. nova ; C. ruiz-lealii comb. nov. ; C. squamulosum var.argentinum comb. nov. ; Systematics ; taxonomy ; Flora of Argentina ; Bolivia ; Brasilia ; Chile ; Ecuador ; Paraguay ; Peru ; Uruguay
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    Notes: Abstract 13 species of the lichen genusCatapyrenium are reported from South America. Five species (C. analogicum, C. andicolum, C. exaratum, C. lachneoides, andC. podolepis) are described as new. A key to the species known from South America is presented. Remarks on taxonomy, ecology and distribution of the species are given.
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  • 87
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    Plant systematics and evolution 185 (1993), S. 91-97 
    ISSN: 1615-6110
    Keywords: Lamiaceae ; Nepetoideae ; Ocimeae ; Isodon ; Plectranthus ; Pyramidium ; Rabdosiella ; Systematics ; taxonomy
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    Topics: Biology
    Notes: Abstract The two generaPlectranthus andIsodon are compared and found to be very dissimilar.Isodon ist considered to be misplaced inOcimeae subtribePlectranthinae and apparently is more closely related to subtribeHyptidinae. The disjunct genusRabdosiella is compared to these two genera and regarded to be polyphyletic. The AfricanR. calycina (Benth.)Codd is returned toPlectranthus and calledP. calycinus Benth., while the AsianR. ternifolia (D. Don)Codd is placed inIsodon sect.Pyramidium and calledI. ternifolius (D. Don)Kudo.
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  • 88
    ISSN: 1615-6110
    Keywords: Gymnosperms ; Pinaceae ; Pinus ; Seed storage proteins ; electrophoresis ; taxonomy
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    Notes: Abstract Electrophoretic studies on seed storage proteins of various gymnosperm species showed that both salt soluble and insoluble protein fractions give taxonomic information. Among species of the genusPinus evident differences are found between the subgeneraHaploxylon (Strobus) andDiploxylon (Pinus). In sect.Strobus the two subsectt.Strobi andCembrae are readily distinguished fromP. bungeana (sect.Parrya) which appears to fall in an intermediate position between haploxyl and diploxyl pines. Among the species of subg.Diploxylon, “mountain pines” show very similar protein patterns in agreement with their recent speciation (Quaternary).
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  • 89
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    Plant systematics and evolution 186 (1993), S. 95-122 
    ISSN: 1615-6110
    Keywords: Polygonaceae ; Persicarieae ; Rubrivena ; Persicaria sect.Rubrivena ; P. wallichii var.wallichii (=Polygonum polystachyum) ; P. wallichii var.tomentosa ; var. nov. ; P. pinetorum ; Anatomy ; micromorphology ; pollen morphology ; cladistics ; heterostyly ; taxonomy ; Flora of Himalaya
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    Notes: Abstract Morphological and anatomical characters (including pollen morphology) of the genusRubrivena are described. The phylogenetic relationships ofRubrivena, the putatively related genusKoenigia and the four sections of the genusPersicaria are analyzed by the application of cladistic methods.Persicaria s. str. turns out to be paraphyletic; however, inclusion ofRubrivena produces a clade which is marked by five synapomorphies (e.g., long styles, semitectate reticulate pollen grains and some seed characters). In order to eliminate the paraphyly ofPersicaria as well as to avoid nomenclatural changes of all taxa of sect.Cephalophilon, Rubrivena is included in the genusPersicaria. Sect.Rubrivena differs from the other sections in pollen morphology [granulated muri and 6 (–7)-zonocolpate aperture system] and inflorescence type (well-branched panicles). In addition, heterostyly is confirmed inPersicaria wallichii, and is reported here also forP. pinetorum. Keys and descriptions are provided for all taxa and a distribution map is given. Two species are illustrated by line drawings. One new variety,Persicaria wallichii var.tomentosa, is described. Five lectotypes are selected.
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  • 90
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    Plant systematics and evolution 189 (1994), S. 165-191 
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rutaceae ; Zanthoxylum ; Fagara ; Flower morphology ; perianth ; gynoecium ; acrostylous and anacrostylous-basistylous carpels ; compitum ; taxonomy
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    Notes: Abstract The question whether the uniseriate perianth ofZanthoxylum L. s. str. is homologous with the calyx or the corolla of taxa included inFagara, or of an independent origin, has been controversial for a long time, but the arguments mostly have remained theoretical. The present investigation of floral structures indicates that there are two different types of uniseriate perianth inZanthoxylum s. str. Therefore, this taxon does not represent a natural group and should be united withFagara asZanthoxylum s.l. The infrageneric taxonomy of this genus is still very ambiguous. It is shown that differences in indumentum, number of sepals and petals (5-4-3) resp. perianth segments (4–9), stamens (3–6), and free carpels (1–5) are of systematic relevance. Particularly important but so far neglected is carpel shape, where an acrostylous and an anacrostylous-basistylous type can be recognized. Stigmata of 2 or more carpels mostly fuse to form a compitum. 4–5-merous flowers with calyx and corolla, and acrostylous carpels are considered as plesiomorphic character states in the genus. On the basis of ± corresponding morphological and phytochemical progressions a working hypothesis about the relationships withinZanthoxylum s.l. is presented in graphical form (Fig. 9).
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  • 91
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    Plant systematics and evolution 191 (1994), S. 111-126 
    ISSN: 1615-6110
    Keywords: Colchicaceae ; Androcymbium ; Allozymes ; evolution ; taxonomy ; genetic conservation
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    Topics: Biology
    Notes: Abstract Levels of allozymic and morphological diversity amongAndrocymbium gramineum, A. europaeum, andA. psammophilum have been assessed using data on 17 allozyme loci and 18 morphological characters. No apparent pattern of geographic or ecological variation was found. Our results also suggest thatA. gramineum andA. europaeum should be considered members of a single species and that the insular speciesA. psammophilum can no longer be thought of as the result of a founder effect fromA. gramineum. Intrapopulational variability was greater than inter-populational variability at both levels studied, which is of strategic interest for the “ex-situ” conservation of these threatened endemic species.
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  • 92
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    Keywords: Rosaceae ; Rosa sect.Caninae ; Systematics ; taxonomy ; genetic variation ; hemisexual ; apomixis
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    Notes: Abstract Difficulties in delimiting well-defined entities in the dogroses (Rosa sect.Caninae) has resulted in very variable taxonomic treatments. The present study was undertaken to provide a background for taxonomy as well as plant breeding. Morphometric diversity was analysed on seedlings obtained from field collections in South Sweden of three species,Rosa dumalis, R. rubiginosa andR. villosa. A canonical variates analysis showed that the three species are relatively distinct whereas two subspecies ofR. dumalis were less well discriminated. Analyses of variance demonstrated that intraspecific variation is pronounced inR. dumalis and, to a lesser extent, inR. villosa.
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  • 93
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    Plant systematics and evolution 205 (1997), S. 241-264 
    ISSN: 1615-6110
    Keywords: Boraginaceae ; Boragineae ; Anchusella ; A. variegata ; A. cretica ; Lycopsis ; Anchusa ; Mediterranean flora ; macromorphology ; micromorphology ; karyology ; taxonomy
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    Notes: Abstract The two closely related speciesLycopsis variegata andAnchusa cretica, formerly placed inAnchusa subg.Rivinia, were compared with the type species ofLycopsis andAnchusa, on the basis of a set of macro and microcharacters. The presence of only two fertile stamens as well as other peculiar characters in flower structure, androecium, gynoecium, pollen and fruit, supports the institution of the new genusAnchusella, consisting ofA. variegata andA. cretica. Karyological and eco-chorological aspects are consistent with morphological data in pointing to the autonomy of this genus, which appears characterized by autapomorphic, advanced traits.
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  • 94
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    Plant systematics and evolution 208 (1997), S. 1-9 
    ISSN: 1615-6110
    Keywords: Fabaceae ; Vicia faba ; V. kalakhensis ; Seed albumins ; HPLC ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Previously reported electrophoretic seed albumin data have shown an unexpected association ofVicia faba withV. kalakhensis. In the present work, seed albumins ofV. faba (subsp.paucijuga and subsp.faba) were compared with those ofV. kalakhensis using ionexchange (IE) and reversed-phase (RP) high-performance liquid chromatography (HPLC). Two subspecies ofV. faba displayed similar seed albumin profiles. On the other hand, seed albumin profiles ofV. faba andV. kalakhensis showed no major protein peak in common either in IE-HPLC or RP-HPLC chromatograms. The reported differences in seed albumin composition ofV. faba andV. kalakhensis are consistent with other taxonomical data showingV. faba to be genetically distant from the wild relatives.
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  • 95
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    Plant systematics and evolution 208 (1997), S. 239-248 
    ISSN: 1615-6110
    Keywords: Fabaceae ; Vicia ; sect.Hypechusa ; sect.Peregrinae ; Electrophoresis ; seed albumins ; taxonomy
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    Notes: Abstract This work is a continuation of electrophoretic investigations aimed at revealing a wild relative ofVicia faba. Electrophoretic analysis (PAGE) of seed albumins covered 52 accessions representing eightVicia species of sect.Hypechusa and two species of sect.Peregrinae. Most of the examined species showed an intraspecific variation due to differences between accessions and/or individual variation within accessions. In spite of the intraspecific variation, marked interspecific differences were recorded. However, none of the investigated species displayed electrophoretic seed albumin patterns similar to those reported earlier forV. faba. Contribution of the obtained results to characterization of the examined taxa is discussed.
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  • 96
    ISSN: 1615-6110
    Keywords: Fabaceae ; Vicia faba ; trnL intron ; PCR-sequencing ; taxonomy
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    Notes: Abstract The chloroplasttrnL intron from 46 differentVicia accessions, representing five of the nine sections of the genusVicia subg.Vicia sensuMaxted (1991a) were amplified by the Polymerase Chain Reaction (PCR) using oligonucleotide primers homologous to conserved regions intrnL. The products fell into two distinct groups; those of approximately 250 nt and those of around 450 nt in length. Of these, products from 17 differentVicia species were cloned and their nucleotide sequences determined. Multiple alignments were assembled and phylogenetic trees constructed by the weighted least-squares distance method. ALathyrus latifolius trnL intron sequence was used as an outgroup. The resulting trees clearly group and separate the sectt.Narbonensis, Bithynica andFaba species but were less able to distinguish species from sectt.Hypechusa andPeregrinae. Based on these sequence data,V. faba appears to be more distant from sect.Narbonensis than sectt.Hypechusa andPeregrinae. The results are in general agreement with a recent treatment ofVicia subg.Vicia (Maxted 1993) and lend further support to placingV. faba in the monospecific sect.Faba.
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  • 97
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    Plant systematics and evolution 213 (1998), S. 173-186 
    ISSN: 1615-6110
    Keywords: Fabaceae ; Vicia ; sect.Bithynicae ; sect.Narbonensis ; Allozymes ; genetic diversity ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Electrophoretic analysis of five enzyme systems, LAP, PGI, SKDH, SOD and 6-PGDH, among 102Vicia accessions representingV. bithynica and seven species of theV. narbonensis complex, namelyV. eristalioides, V. kalakhensis, V. johannis, V. galilaea, V. serratifolia, V. narbonensis andV. hyaeniscyamus, has been performed. The recorded variation was tentatively assigned to 41 allelic genes at eight loci; intraspecific variation was observed in all species except forV. eristalioides. The results obtained were compared with the corresponding data reported earlier forV. faba. Hierarchical grouping of the investigated taxa, includingV. faba, was based onNei's genetic identities calculated from the allozyme frequency data.Vicia faba andV. bithynica were shown to be most distantly related to one another and to the remaining species investigated.Vicia serratifolia appeared to be a peripheral member of theV. narbonensis complex. The results are discussed with reference to genetic diversity and taxonomic relationships of the species under study.
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  • 98
    ISSN: 1615-6110
    Keywords: Bryophyta ; Mitochondria ; nad5 gene ; group I intron ; molecular phylogeny ; taxonomy
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    Topics: Biology
    Notes: Abstract In contrast to animals, the slowly evolving mitochondrial nucleotide sequences of plants appear well suited to investigate phylogenetic relations between old taxonomic groups. Analysis ofnad5 gene sequences in 47 bryophytes, the living representatives of very early land plants, confirm this assessment. Statistically reliable phylogenetic trees are obtained with different mathematical approaches. A group I intron sequence conserved in thenad5 gene of all 30 mosses and 15 liverworts investigated supports a sister group relationship of the two classes. The intron sequence adds phylogenetic information for fine resolution on top of the conserved exon sequences down to the level of classically defined orders or families, respectively. This intron is not present in the hornwortsAnthoceros husnotii andA. punctatus. The results allow statements on diverging taxonomic interpretations and support the monophyly of the liverworts, mosses, Jungermanniidae, Marchantiidae and Bryidae, and allow recognition of subclasses like Hypnanae and Dicrananae. Among the mosses, the derived orders (subclass Bryidae) are confidently set apart from the Sphagnales, Andreaeales, Polytrichales and Tetraphidales with Buxbaumiales occupying a mediating position. Among the liverworts, full support is found for the classic separation of simple (jungermanniid) and complex thalloid (marchantiid) species with a strikingly low mitochondrial sequence divergence among the latter.
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  • 99
    ISSN: 1573-5125
    Keywords: Chironomidae ; Epoicocladius ; symbiosis ; taxonomy ; Ephemeridae
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    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.
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    Aquatic ecology 26 (1992), S. 527-531 
    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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