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  • Articles  (117)
  • Occupational Health and Environmental Toxicology  (85)
  • taxonomy
  • Wiley-Blackwell  (86)
  • Springer  (31)
  • American Chemical Society (ACS)
  • 2020-2024
  • 2015-2019
  • 2005-2009
  • 1990-1994  (117)
  • 1980-1984
  • 1992  (117)
  • Biology  (117)
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  • Articles  (117)
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  • Wiley-Blackwell  (86)
  • Springer  (31)
  • American Chemical Society (ACS)
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  • 2020-2024
  • 2015-2019
  • 2005-2009
  • 1990-1994  (117)
  • 1980-1984
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  • 1
    Electronic Resource
    Electronic Resource
    Sporobolomyces lactosus, a new species of ballistosporous yeast equipped with ubiquinone-10 (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 245-248 
    Details
    ISSN: 1572-9699
    Keywords: Sporobolomyces lactosus ; yeasts ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species of ballistospore-forming yeasts was recovered and its description given.Sporobolomyces lactosus, isolated from activated sludge treating petrochemical wastes, produces pinkish-coral to pink colored colonies, assimilates lactose and has Q-10 as the major ubiquinone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584231
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  • 2
    Electronic Resource
    Electronic Resource
    Contributions to a revision of the genusTrichosporon (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 289-316 
    Details
    ISSN: 1572-9699
    Keywords: Trichosporon ; white piedra ; systemic mycosis ; taxonomy ; nDNA ; rRNA ; ubiquinone systems ; basidiomycetous yeasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genusTrichosporon was revised using characters of morphology, ultrastructure, physiology, ubiquinone systems, mol% G+C of DNA, DNA/DNA reassociations and 26S ribosomal RNA partial sequences. A total of 101 strains was used, including all available type and authentic cultures of previously described taxa. Nineteen taxa could be distinguished, 15 of which having Q-9 coenzyme systems and 4 having Q-10. Sixteen previously described names were reduced to synonymy. One new species was described. The genus is characterized by the presence of arthroconidia. Few species possess further diagnostic morphological characters, such as the presence of appressoria, macroconidia or meristematic conidiation. The septa of two species were found to be non-perforate, while those of the remaining species contained dolipores at variable degrees of differentiation, with or without vesicular or tubular parenthesomes. All species were able to assimilate a large number of carbon compounds; visible CO2 production was absent. The genus was found to be fairly homogeneous on the basis of a phylogenetic analysis of partial 26S rRNA sequences, with the exception ofT. pullulans which proved to be unrelated. Most taxa were found to occupy well-defined ecological niches. Within the group of taxa isolated from humans, a distinction found be made between those involved in systemic mycoses and those which mainly caused public or non-public white piedras, respectively. One species was consistently associated with animals, while others came mainly from soil or water. One species was mesophilic and another psychrophilic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713938
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  • 3
    Electronic Resource
    Electronic Resource
    Seasonal changes of microbial populations in the sediments of the basins of Lugano and Agno (1992)
    Springer
    Aquatic sciences 54 (1992), S. 331-337 
    Details
    ISSN: 1420-9055
    Keywords: Heterotrophic bacteria ; sediments ; taxonomy ; seasonal variations ; aerobic bacterial population ; anaerobic bacterial population ; Lake Lugano (Lago di Lugano)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This research was carried out with the aim to explore the heterotrophic microbial population of two sediments in different oxic conditions of the Lake of Lugano (Lago di Lugano). The values of the viable bacterial counts found in our sediment samples were typical for an eutrophic lake. The increase in the proportion of anaerobic to aerobic bacteria at 30 °C observed in the sediment samples of Agno may reflect the depletion of oxygen concentrations in the water column. The generaAeromonas, Pseudomonas, Bacillus andClostridium, as well as strains belonging to the Coryneform-group, represented the major taxonomic groups of heterotrophic bacterial communities in the water-sediment interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878145
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  • 4
    Electronic Resource
    Electronic Resource
    The genusBlepharispermum (Asteraceae, Heliantheae) (1992)
    Springer
    Plant systematics and evolution 182 (1992), S. 149-227 
    Details
    ISSN: 1615-6110
    Keywords: Asteraceae ; Heliantheae ; Blepharispermum ; Revision ; taxonomy ; phylogeny ; cladistics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The palaeotropic genusBlepharispermum (Asteraceae, Heliantheae) is revised for the first time. Fifteen species from Africa, the Arabian Peninsula, Madagascar, India, and Ceylon are recognized. Two new species are described, viz.B. arcuatum andB. canescens. Aspects of the systematic position and morphology of the genus are discussed. A hypothesis of phylogenetic relationships is presented by way of a cladistic analysis. A key to all species in the genus as well as typification, descriptions, drawings and distribution maps are supplied. Chromosome counts of two species are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939188
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  • 5
    Electronic Resource
    Electronic Resource
    Genomic groups, morphology, and sectional delimitation in EurasianElymus (Poaceae, Triticeae) (1992)
    Springer
    Plant systematics and evolution 180 (1992), S. 1-13 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Elymus ; Genome analysis ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seven tetraploid species ofElymus, viz.E. sibiricus, E. caninus, E. gmelinii, E. semicostatus, E. caucasicus, E. parviglume, andE. longearistatus subsp.canaliculatus, representing five sections were studied morphologically and used in interspecific hybridizations. The aim was to investigate whether the present sectional delimitation of the genus was in agreement with genomic data and if there was a correlation between genome constitution and morphology. The study revealed: (i) further information on the genomic affinities between the different species, (ii) that there is no congruence between genome constitution of the species and current sectional delimitation, and (iii) that there is a correlation between genome constitution and morphology in the palea apex shape and in the size of cilia of the palea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940394
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  • 6
    Electronic Resource
    Electronic Resource
    Ruellia sect.Urceolata (Acanthaceae), a novel species complex from southern Mexico (1992)
    Springer
    Plant systematics and evolution 180 (1992), S. 221-225 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Acanthaceae ; Ruellia ; Speciation over short distances ; endemism ; taxonomy ; Flora of Mexico
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new section in MexicanRuellia, R. sect.Urceolata comprising three species (includingR. cedilloi, spec. nova), endemic to Mexico, is described and illustrated. The taxonomic relationship and differentiation of the species are discussed. Evolution in Mexican Ruellas seems to be occurring at the diploid level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00941152
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  • 7
    Electronic Resource
    Electronic Resource
    Hybrid speciation and radiation in the neotropical woody genusTocoyena (Rubiaceae) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 143-169 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Rubiaceae ; Tocoyena ; Hybridization ; differentiation ; speciation ; homogamic complex ; tropical woody plants ; taxonomy ; Flora of South America
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The variation pattern of a large population ofTocoyena formosa in Botucatu, state of São Paulo, Brazil, and of other samples throughout the species area was analysed by morphometrical, statistical, ecological, and phytogeographical methods. Excessive variation and the remarkable coherence of two different character syndromes within this species strongly suggest that it has originated as a homogamic (diploid) hybrid complex. Possible parental species areT. brasiliensis, mainly from the Amazon region, andT. viscidula from the dry caatinga region of NE. Brazil.T. formosa has a much more extensive geographical range and greater ecological plasticity, ranging from the Amazon basin and the Guyanas throughout the Central Brazilian Plateau and from NE. to S. Brazil and Paraguay. Three (partly sympatric) varieties are distinguished withinT. formosa, i.e. var.formosa, var.pseudobrasiliensis (var. nov.), and var.microdon (comb. et stat. nov.). A provisional taxonomic revision, key, and conspectus covers the 12 accepted species ofTocoyena with blunt flower buds and ovate obtuse corolla lobes (group A, includingT. formosa); their distribution is shown in a map.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937441
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  • 8
    Electronic Resource
    Electronic Resource
    Two new species of the diatom genusChaetoceros (Bacillariophyta) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 217-226 
    Details
    ISSN: 1615-6110
    Keywords: Diatoms ; plankton ; Chaetoceros ; New species ; morphology ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two new planktonic diatom species of the genusChaetoceros are described herein:Ch. octagonus andCh. rectus, from material of Baja California coasts and the Gulf of California, respectively;Ch. rectus was also found in a sample from Australian waters.Ch. octagonus is a robust species, with a characteristic pyramidal valve shape, heavily silicified valves and setae, and one central rimoportula on every valve in the chain; it is compared with related species, which show a similar morphology, especially by electron microscopy. It belongs into subg.Chaetoceros, sect.Borealia. Ch. rectus is placed in subg.Hyalochaete, and provisionally within sect.Anastomosantia. Its major characters are: chains, cells, and setae are delicate and fragile, cells are joined in the chain by a “bridge” which connects sibling intercalary setae, valves and setae are weakly silicified, and one rimoportula is present on terminal valves only. Comparison is made with another species of the same section.Ch. rectus shows a different manner of chain-forming within the genus than previously described in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937445
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  • 9
    Electronic Resource
    Electronic Resource
    A new combination and a new species in the lichen genusCatapyrenium (lichenizedAscomycetes, Verrucariaceae) (1992)
    Springer
    Plant systematics and evolution 181 (1992), S. 255-260 
    Details
    ISSN: 1615-6110
    Keywords: Pyrenocarpous lichens ; Verrucariaceae ; Dermatocarpon ; Catapyrenium ; Catapyrenium velebiticum comb. nov. ; Catapyrenium pyrenaicum spec. nova ; Systematics ; taxonomy ; Flora of Austria, Croatia, France, Spain, and Switzerland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Catapyrenium pyrenaicum is described as new from northern Spain and adjacent France, and the new combinationCatapyrenium velebiticum is made. The new species differs fromC. velebiticum mainly in its laminal pycnidia. Remarks on taxonomy, ecology, and distribution of the species are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937449
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  • 10
    Electronic Resource
    Electronic Resource
    Descriptions of the larvae of four nearctic species ofEpoicocladius (Diptera: Chironomidae) with a redescription ofEpoicocladius ephemerae (Kieffer) (1992)
    Springer
    Aquatic ecology 26 (1992), S. 145-155 
    Details
    ISSN: 1573-5125
    Keywords: Chironomidae ; Epoicocladius ; symbiosis ; taxonomy ; Ephemeridae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The larvae of four species ofEpoicocladius from eastern North America are described along with a redescription of the European species,Epoicocladius ephemerae (Kieffer). A key to known 4th instar Nearctic and western PalaearcticEpoicocladius larvae is presented. Previous species descriptions and records of NearcticEpoicocladius spp. are discussed in reference to the larvae described here. Larvae ofEpoicocladius ephemerae (Kieff.), a species described from Europe which is currently synonymized with the NearcticE. flavens, have yet to be collected in North America. This suggests that the synonymy is invalid andE. ephemerae should be considered a legitimate species. A likely candidate to be the larva ofEpoicocladius flavens (Malloch) is suggested. However, until reared adults are obtained, the larva ofE. flavens remains unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02255235
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