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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Gastropus

Gastropus Imhof, 1888 (ref. ID; 2978, 3514), 1891 (ref. ID; 7815), or 1898 (ref. ID; 1345, 3688)

Order Ploimida: Family Gastropodidae (ref. ID; 7097)

See Gastroschiza

Synonym Hudsonella Zacharias, 1893 (ref. ID; 2978, 3688); Hudsonia Hood, 1893 (ref. ID; 2978, 3688)

ref. ID; 1663

Lorica composed of one rigid piece, laterally composed. Surface of lorica plain. Lorica with a small ventral opening for the foot. Foot annulated with one or two toes. Mastax virgate. (ref. ID; 1663)

ref. ID; 3114

The species is distinguished on the basis of the following characters. 1. number of the toes 2. features (as seen on side view) of the head region 3. body length 4. position of the foot 5. position of the dorsal antenna. Of these, the length of the body, the position of the foot opening, are not so important as the systemtics and Sudzuki prefers to use the number of the unclei within the vitellarium as the first taxonomic character. (ref. ID; 3114)
  1. Gastropus bretensis Linder, 1904
    See; Gastropus hyptopus (ref. ID; 1345), Postclausa hyptopus (ref. ID; 3688)
  2. Gastropus clavulatus Wesenberg-Lund, 1923
    See; Epiphanes clavulata (ref. ID; 3688)
  3. Gastropus ehrenbergi Imhof, 1891
    See; Ploesoma lenticulare (ref. ID; 1345)
  4. Gastropus flexilis Jagerskiold, 1892
    See; Ploesoma hudsoni (ref. ID; 1345)
  5. Gastropus hudsoni Imhof, 1891
    See; Bipalpus hudsoni (ref. ID; 3688), Ploesoma hudsoni (ref. ID; 1345)
  6. Gastropus hyptopus (Ehrenberg, 1838) (ref. ID; 1132, 1345, 1923, 2268, 2278, 2757, 2994, 3271, 7846) reported year? (ref. ID; 2933, 3015, 3064) reported author and year? (ref. ID; 5389)
    Syn; Gastropus bretensis Linder, 1904 (ref. ID; 1345); Gastropus hyptopus Lindner, 1904 (ref. ID; 3271) or Weber, 1898 (ref. ID; 1345, 3271); Notommata hyptopus Ehrenberg, 1838 (ref. ID; 1345, 2757, 3271); Notommata hyptopus Hudson & Gosse; 1886 (ref. ID; 1345); Notommata hyptopus Imhof, 1838 (ref. ID; 2278); Notops hyptopus Hudson & Gosse, 1886 (ref. ID; 2278, 3271); Postclausa hyptopus (Ehrenberg) (ref. ID; 1132)
  7. Gastropus minor (Rousselet, 1892) (ref. ID; 1345, 1923, 2276, 2757, 2814, 2994) reported year? (ref. ID; 1450)
    See; Postclausa minor (ref. ID; 1132, 3688)
    Syn; Notops fennicus Stenroos, 1898 (ref. ID; 1345); Notops minor Rousselet, 1892 (ref. ID; 1345, 2276, 2757); Postclausa circularis Hilgendorf, 1898 (ref. ID; 2276); Postclausa minuta Hilgendorf, 1898 (ref. ID; 2276)
  8. Gastropus orbicularis Harring & Myers, 1922
    See; Gastropus stylifer (ref. ID; 3688)
  9. Gastropus pygmaeus Vivier, 1937
    See; Gastropus stylifer (ref. ID; 3688)
  10. Gastropus stylifer Imhof, 1887 (ref. ID; 3688) or 1891 (ref. ID; 1345, 1923, 2268, 2551, 2932, 3514) reported year? (ref. ID; 2933, 3015, 3046) reported author and year? (ref. ID; 5389)
    Syn; Ascomorpha orbicularis Jennings, 1901 (ref. ID; 3688); Gastropus orbicularis Harring & Myers, 1922 (ref. ID; 3688); Gastropus pygmaeus Vivier, 1937 (ref. ID; 3688); Hudsonella picta Zacharias, 1893 (ref. ID; 1345, 3688); Hudsonella pygmaea Zacharias, 1894 (ref. ID; 1345, 3688); Hudsonella ruber Hood, 1893 (ref. ID; 1345); Hudsonia ruber Hood, 1893 (ref. ID; 3688); Notops pygmaeus Calman, 1892 (ref. ID; 1345, 3688); Sacculus orbicularis Kellicott, 1897 (ref. ID; 3688)

Gastropus hyptopus (Ehrenberg, 1838) (ref. ID; 1132, 1345, 1923, 2268, 2278, 2757, 2932, 2994, 3271, 7846) reported year? (ref. ID; 2933, 3015, 3064) reported author and year? (ref. ID; 5389)

Synonym

Gastropus bretensis Linder, 1904 (ref. ID; 1345); Gastropus hyptopus Lindner, 1904 (ref. ID; 3271) or Weber, 1898 (ref. ID; 1345, 3271); Notommata hyptopus Ehrenberg, 1838 (ref. ID; 1345, 2757, 3271); Notommata hyptopus Hudson & Gosse, 1886 (ref. ID; 1345); Notommata hyptopus Imhof, 1838 (ref. ID; 2278); Notops hyptopus Hudson & Gosse, 1886 (ref. ID; 2278, 3271); Postclausa hyptopus (Ehrenberg) (ref. ID; 1132)

Descriptions

Wiszniewski (1953) places this species in Postclausa Hilgendorff, 1899. (ref. ID; 1923)

Male: Male present. (ref. ID; 3064)

Quote from ref. ID; 3064

Measurements

Overall length 190; max. width 140 µm. (ref. ID; 2278)

Gastropus minor (Rousselet, 1892) (ref. ID; 1345, 1923, 2276, 2757, 2814, 2994) reported year? (ref. ID; 1450)

See

Postclausa minor (ref. ID; 1132, 3688)

Synonym

Notops fennicus Stenroos, 1898 (ref. ID; 1345); Notops minor Rousselet, 1892 (ref. ID; 1345, 2276, 2757); Postclausa circularis Hilgendorf, 1898 (ref. ID; 2276); Postclausa minuta Hilgendorf, 1898 (ref. ID; 2276)

Descriptions

Wiszniewski (1953) places this species in Postclausa Hilgendorff, 1899. (ref. ID; 1923)

Gastropus stylifer Imhof, 1887 (ref. ID; 3688) or 1891 (ref. ID; 1345, 1923, 2268, 2551, 2932, 3514) reported year? (ref. ID; 2933, 3015, 3046) reported author and year? (ref. ID; 5389)

Synonym

Ascomorpha orbicularis Jennings, 1901 (ref. ID; 3688); Gastropus orbicularis Harring & Myers, 1922 (ref. ID; 3688); Gastropus pygmaeus Vivier, 1937 (ref. ID; 3688); Hudsonella picta Zacharias, 1893 (ref. ID; 1345, 3688); Hudsonella pygmaea Zacharias, 1894 (ref. ID; 1345, 3688); Hudsonella ruber Hood, 1893 (ref. ID; 1345); Hudsonia ruber Hood, 1893 (ref. ID; 3688); Notops pygmaeus Calman, 1892 (ref. ID; 1345, 3688); Notops ruber Hood, 1892 (ref. ID; 3688); Sacculus orbicularis Kellicott, 1897 (ref. ID; 3688)

Descriptions

This species, common in lake plankton is the most colorful rotifer; violet epidermis, blue stomach studded with orange fat globules, and red eye. (ref. ID; 1923)