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  • taxonomy
  • Springer  (6)
  • American Chemical Society (ACS)
  • American Meteorological Society
  • 2015-2019
  • 2000-2004
  • 1980-1984  (6)
  • 1970-1974
  • 1960-1964
  • 1940-1944
  • 1981  (6)
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Publisher
  • Springer  (6)
  • American Chemical Society (ACS)
  • American Meteorological Society
Years
  • 2015-2019
  • 2000-2004
  • 1980-1984  (6)
  • 1970-1974
  • 1960-1964
    • +
Year
  • 1
    Electronic Resource
    Electronic Resource
    Some observations on cell wall structure and taxonomy ofPhymatodocis nordstedtiana (Conjugatophyceae, Chlorophyta) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 217-225 
    Details
    ISSN: 1615-6110
    Keywords: Conjugatophyceae ; Desmidiales ; Phymatodocis nordstedtiana ; Cell wall ; pore apparatus ; taxonomy ; ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Filaments ofPhymatodocis nordstedtiana Wolle were isolated from a sample of a Texan lake. Cultures were established and examined by light and scanning electron (SEM) as well as transmission electron microscopy (TEM). It is shown that the pores apparent on light microscopical examination are not of the cosmaroid type as expected. TEM examination disclosed that they are similar to those found in the generaClosterium Ralfs andPenium Bréb. Furthermore, it could be demonstrated by light and SEM microscopy that the primary cell wall is shed during cell division. The remaining secondary cell wall of the mature cell consists of interwoven bands of parallel microfibrils. A conspicuous overlap of the semicell walls clearly denotes the isthmus region. The significance of these deviations unusual for desmids is discussed. Suggestions are made that the taxonomic position ofPh. nordstedtiana should be re-evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985185
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  • 2
    Electronic Resource
    Electronic Resource
    Chlamydomonas chlorococcoides nova spec., eine neue Art mit gelapptem Chloroplast (Volvocales, Chlorophyta) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 115-120 
    Details
    ISSN: 1615-6110
    Keywords: Volvocales ; Chlamydomonas ; Morphology ; reproduction ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlamydomonas chlorococcoides, a morphologically most interesting new species with a lobate chloroplast was isolated from soils of the island Lavsa (Adriatic Sea, Yugoslavia). Description, pictures and remarks on the reproduction are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984612
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  • 3
    Electronic Resource
    Electronic Resource
    Karyological and taxonomic studies of Dugesia japonica Ichikawa et Kawakatsu in the Far East (1981)
    Springer
    Hydrobiologia 84 (1981), S. 53-68 
    Details
    ISSN: 1573-5117
    Keywords: Turbellaria ; Tricladida ; Dugesia ; karyology ; taxonomy ; Japan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A review of previous studies on the taxonomy, karyology and chorology of a polymorphic species Dugesia japonica from the Far East is presented. Two subspecies are now known: D. j. japonica (n = 8, 2x = 16, 3x = 24) and D. j. ryukyuensis (n = 7, 2x = 14, 3x = 21). An attempt has also been made to determine the definition of the B-chromosome as LB and SB and the variation of the karyotypes of both subspecies is described. Every known karyotype of D. japonica is classified into six groups (see Table 2). D. japonica from many localities has a diploid karyotype (2x), a triploid karyotype (3x) and an orthoploidic mixoploid karyotype of 2x & 3x. The origin and the karyological significance of these karyotypes are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026163
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  • 4
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy of taxonomic diagnostic criteria of the freshwater sponge, Heteromeyenia tubisperma (Potts, 1881) (Porifera : Spongillidae) (1981)
    Springer
    Hydrobiologia 77 (1981), S. 257-259 
    Details
    ISSN: 1573-5117
    Keywords: Sponge ; Porifera ; taxonomy ; scanning electron microscopy ; Heteromeyenia tubisperma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Taxonomic diagnostic criteria of the spongillid freshwater sponge, Heteromeyenia tubisperma (Potts, 1881) were examined using scanning electron microscopy. The species is characterized by a gemmule which bears an unusually long, prominent porous tube. The application of SEM to the systematic studies of the freshwater sponges provides diagnostic capabilities not available with the light microscope. It is desirable that a key, coupled with a reference atlas of scanning electron micrographs illustrating taxonomic diagnostic criteria of freshwater sponge species, particularly utilizing type specimens, be developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019672
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  • 5
    Electronic Resource
    Electronic Resource
    Sand dwelling Turbellaria from the Netherlands Delta area (1981)
    Springer
    Hydrobiologia 84 (1981), S. 113-127 
    Details
    ISSN: 1573-5117
    Keywords: Turbellaria ; meiobenthos ; fauna composition ; taxonomy ; Netherlands Delta area
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sand dwelling Turbellaria from the Delta of the Rivers Rhine, Meuse and Scheldt have been investigated. Thirty-eight samples taken from littoral and sublittoral stations in the Grevelingen, Eastern and Western Scheldt have been analysed. Thirty-three species were recorded (Acoela were not considered); twenty-four of them are new for the area and seven new species are described. Density and diversity of Turbellaria were higher in the Eastern Scheldt than in the Western Scheldt or in the Lake Grevelingen. A maximum density of 82 ind./100 cm3 was noted. A tentative calculation on relative abundance of the representatives of the different Turbellaria orders is established. Proseriata seem to be dominant in the localities studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026169
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  • 6
    Electronic Resource
    Electronic Resource
    New England Coelogynoporidae (1981)
    Springer
    Hydrobiologia 84 (1981), S. 139-145 
    Details
    ISSN: 1573-5117
    Keywords: Turbellaria ; Proseriata ; Coelogynoporidae ; taxonomy ; New England
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Eleven species of the proseriate turbellarian family Coelogynoporidae have been encountered between Cape Cod, Mass. and the southern shore-line of New Brunswick, Canada. The distributions of Coelogynopora schultzii, C. biarmata and Cirrifera cirrifera are reported. Four new species belonging to the genus Coelogynopora, one new species of Cirrifera and a species belonging to a new genus are described. Two species remain undescribed. Biological observations on a laboratory-reared colony of C. biarmata maintained since 1978 are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026172
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