Main Content
< Top page

The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Prismatolaimus

Prismatolaimus De Man, 1880 (ref. ID; 1861, 1923, 2588, 3439, 3570) or Prismatoloaimus (ref. ID; 1311, 1663)

Enoplida Filijev, 1929: Family Prismatolaimidae Micoletzky, 1922: Subfamily Prismatolaiminae Micoletzky, 1922 (ref. ID; 3570)

Family Monhysteridae (ref. ID; 880)

Family Prismatolaimidae (ref. ID; 6168, 6182, 6740)

ref. ID; 1663

Stoma large, cup-shaped; width and depth of stoma at least one-half of lip region; stoma strongly cuticularized. Posterior end filiform and without spinneret; six large and four stout cephalic setae. Common species. (ref. ID; 1663)

ref. ID; 1923

Stoma cylindroid. Fresh water. (ref. ID; 1923)

ref. ID; 3570

Type species

Monhystera intermedia Butschli, 1873, subsequent designated by De Man in Stiles & Hassal, 1905 (ref. ID; 3570)

ref. ID; 6153, 6859

Bacterivore. (ref. ID; 6153, 6859)
  1. Prismatolaimus aquaticus Daday, 1897 (ref. ID; 3570)
  2. Prismatolaimus australis Cobb, 1893
    See; Prismatolaimus dolichurus (ref. ID; 3570)
  3. Prismatolaimus brevicaudatus Wu & Hoeppli, 1929 (ref. ID; 3570)
    Syn; Prismatolaimus dolichurus subsp. brevicaudatus Wu & Hoeppli, 1929 (ref. ID; 3570)
  4. Prismatolaimus bulbosus (subsp.) Daday, 1897 (ref. ID; 3570)
    See; Prismatolaimus dolichurus (ref. ID; 3570)
  5. Prismatolaimus dadayi Stefanski, 1925 (ref. ID; 3570)
  6. Prismatolaimus digitatus N.A. Cobb in M.V. Cobb, 1915 (ref. ID; 3570)
    See; Prismatolaimus intermedius (ref. ID; 3570)
  7. Prismatoloaimus dolichurus De Man, 1880 (ref. ID; 1311)
  8. Prismatolaimus dolichurus De Man, 1876 (ref. ID; 2588) or 1880 (ref. ID; 3570)
    Syn; Prismatolaimus australis Cobb, 1893 (ref. ID; 3570); Prismatolaimus dolichurus subsp. bulbosus Daday, 1897 (ref. ID; 3570); Prismatolaimus dolichurus subsp. minimus Micoletzky, 1922 (ref. ID; 3570); Prismatolaimus stenurus Cobb, 1914 (ref. ID; 3570)
  9. Prismatolaimus hawaiiensis Cobb, 1906 (ref. ID; 3570)
    See; Prismatolaimus intermedius (ref. ID; 3570)
  10. Prismatolaimus hsuei Wu & Hoeppli, 1929 (ref. ID; 3570)
  11. Prismatolaimus intermedius (Butschli, 1873) De Man, 1880 (ref. ID; 881, 1756, 1774, 1861, 2588, 3570) reported author and year? (ref. ID; 7080)
    Syn; Monhystera intermedia Butschli, 1873 (ref. ID; 3570); Prismatolaimus digitatus N.A. Cobb in M.V. Cobb, 1915 (ref. ID; 3570); Prismatolaimus hawaiiensis Cobb, 1906 (ref. ID; 3570); Prismatolaimus parvus Milne, 1963 (ref. ID; 3570)
  12. Prismatoloaimus kenyensis Mulk & Coomans, 1979 (ref. ID; 1311)
  13. Prismatolaimus leptolaimus Andrassy, 1969 (ref. ID; 3570)
  14. Prismatolaimus macrurus Daday, 1899
    See; Monhystera dadayi (ref. ID; 3570)
  15. Prismatolaimus microstomus Daday, 1905
    See; Paraphanolaimus microstomus (ref. ID; 3570)
  16. Prismatolaimus minimus (subsp.)
    See; Prismatolaimus dolichurus (ref. ID; 3570)
  17. Prismatolaimus nodicaudatus Daday, 1899 (ref. ID; 3570)
  18. Prismatolaimus papuanus Daday, 1899
    See; Achromadora papuana (ref. ID; 3570)
  19. Prismatolaimus parvus Milne, 1963
    See; Prismatolaimus intermedius (ref. ID; 3570)
  20. Prismatolaimus primitivus Loof, 1971 (ref. ID; 3570)
  21. Prismatolaimus stenolaimoides Loof, 1971 (ref. ID; 3570)
  22. Prismatolaimus stenolaimus De Man, 1921 (ref. ID; 3570)
  23. Prismatolaimus stenurus Cobb, 1914 (ref. ID; 3570) reported author and year? (ref. ID; 1923)
    See; Prismatolaimus dolichurus (ref. ID; 3570)
  24. Prismatolaimus tenuicaudatus Stekhoven, 1951 (ref. ID; 3570)
  25. Prismatolaimus verrucosus Hirschmann, 1952 (ref. ID; 3570)
  26. Prismatolaimus waipukea (Yeates, 1967) Andrassy, 1969 (ref. ID; 3570)
    Syn; Takakia waipukea Yeates, 1967 (ref. ID; 3570)

Prismatoloaimus dolichurus De Man, 1880 (ref. ID; 1311)

Descriptions

Body after fixation from slightly to strongly ventrally coiled, tapering especially posteriorly. Cuticle with marked transverse striae starting around one lip region width from the anterior end. Somatic setae distribution uneven and variable from specimen to specimen, 5-7 in the neck region, 5-13 between cardia and anus and 2-12 on tail. Fine dot-like crystalloid bodies all over the body. Lip region unstriated, continuous with the remainder of the body. Six outer labial and four cephalic setae in one whorl situated on the lip region. Labial setae slightly more than one and one half times cephalic setae, with a slightly anteriorly curved tip. Amphid aperture transverse oval, situated slightly more than two lip region widths from the anterior end. Stoma anteriorly barrel-shaped, 1.3 times longer than wide, posteriorly followed by a very short irregular funnel-shaped part with a blunt dorsal tooth-like projection. Posterior part of stoma surrounded by pharynx. Pharynx cylindrical, muscular, narrowing where it passes through the nerve ring i.e. anterior to middle. Cardia oval, 0.5-0.6 times corresponding body width, and it is anteriorly surrounded by four elongate-oval centrally transparent cells. Excretory pore and ventral gland not observed. A glandular structure with a non-sclerotized dorsal pore is situated about 24(18-29) µm from the end of the pharynx. It has a more or less oval or longitudinally elongated shape. Rectum 0.7 times anal body width. Tail steadily tapering, filiform, 20 times rectal length, terminating in a dorsal hook-like mucro. Female reproductive system didelphic amphidelphic with reflexed ovaries. No spematozoans in mature females. Vagina one-fifth of the corresponding body width. Vulva anterior to mid-body. (ref. ID; 1311)
  • Male: Male not found. (ref. ID; 1311)

    Measurements

    Body length 747.4+/-38.0(707-809) µm, maximum body width 23.5+/-1.9(21-26) µm, pharyngeal length measured from the anterior end 185.4+/-3.8(179-189) µm, tail length 235.4+/-23.6(202-267) µm, anal body width 16.5+/-1.8(15-20) µm, lip region width 12.6+/-0.4(12-13) µm, labial seta length 9.0+/-1.1(8-11) µm, cephalic seta length 3.9+/-1.5(4-7) µm, stoma length 9.0+/-0.7(8-10) µm, stoma width 6.6+/-0.4(6-7) µm, amphid anterior body end 27.0+/-2.0(25-29) µm, nerve ring from the anterior end 84.5+/-5.2(79-93) µm, rectal length 11.4+/-0.4(10-12) µm. (ref. ID; 1311)

    Prismatoloaimus kenyensis Mulk & Coomans, 1979 (ref. ID; 1311)

    Descriptions

    Body after fixation curved ventrad, tapering especially posteriorly. Cuticle with transverse striae. Four somatic setae clearly seen on tail, setae being inconspicuous in other parts of the body. Head continuous with rest part of the body. Six long outer labila setae and four shorter cephalic setae situated on the lip region in one whorl. Stoma barrel-shaped, 1.3 times longer than wide. Amphidial aperture transverse oval, situated around 3.3 times lip region from the anterior end. Pharynx cylindrical, surrounded by nerve ring slightly anterior to two-thirds of its length. Cardia more or less oval in shape, wider than long and anteriorly it is surrounded by four elongate-oval centrally transparent cells. Intestine with a weakly developed progaster. Rectum 0.7 times anal body widths long. Tail steadily tapering, 18 rectal lengths long, terminating in a small mucro. Female reproductive system didelphic, amphidelphic, with reflexed ovaries. Vulva slightly posterior to middle of body. (ref. ID; 1311)

    Measurements

    Female (n=1): Body length 486 µm, maximum body width 14 µm, pharyngeal length measured from the anterior end 135 µm, tail length 126 µm, lip region width 6 µm, cephalic seta length 3 µm, stoma length 4 µm, stoma width 3 µm, amphid anterior body end 20 µm, anal body width 10 µm, labial setae length 4 µm, cardia length 7 µm, cardia width 8 µm, rectal length 7 µm. (ref. ID; 1311)