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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Onchulus

Onchulus Cobb, 1920 (ref. ID; 3570)

Enoplida Filijev, 1929: Family Prismatolaimidae Micoletzky, 1922: Subfamily Onchulinae Andrassy, 1963 (ref. ID; 3570)

ref. ID; 3570

Type species

Onchulus longicaudatus Cobb, 1920 (ref. ID; 3570)
  1. Onchulus filicaudatus Altherr, 1972 (ref. ID; 3570)
  2. Onchulus fuscilabiatus Altherr, 1965 (ref. ID; 3570)
  3. Onchulus longicauda (Daday, 1899) Andrassy, 1964 (ref. ID; 3570)
    Syn; Monhystera longicauda Daday, 1899 (ref. ID; 3570); Onchulus longicaudatus Cobb, 1920 (ref. ID; 3570)
  4. Onchulus longicaudatus Cobb, 1920
    See; Onchulus longicauda (ref. ID; 3570)
  5. Onchulus longicaudatus (Daday, 1899) Andrassy, 1964 (ref. ID; 1311)
  6. Onchulus nolli Goffart, 1950 (ref. ID; 3570)
  7. Onchulus oistospiculum (Allgen, 1933) (ref. ID; 3570)
    Syn; Cyatholaimus oistospiculum Allgen, 1933 (ref. ID; 3570)

Onchulus longicaudatus (Daday, 1899) Andrassy, 1964 (ref. ID; 1311)

Descriptions

Strongly ventrally curved. Cuticle appearing smooth, but with fine transverse striae under SEM; with somatic setae, the first being situated slightly less than one and one-half lip region width from the anterior end. Fine crystalloid bodies in most parts of the body. Lip region continuous with the rest of the body; with six inner labial papillae followed by six long outer labial and four shorter cephalic setae, the labial ones nearly three times as long as the cephalic ones. Mouth opening hexaradiate. Amphidial fovea with transverse-oval aperture and situated slightly more than twice the lip region width from the anterior end; immediately followed by the fusus amphidialis. Stoma funnel-shaped, well sclerotized, and with a strongly developed dorsal tooth. Pharynx cylindrical and strongly muscular. Cardia more or less circular and nearly two-fifths of the corresponding body width. Nerve ring surrounds pharynx anterior to middle. Intestinal cells clearly visible. Rectum three quarter of anal body width long. Tail filiform and long, around 40 times rectal length. Female reproductive system didelphic, amphidelphic with reflexed ovaries. Vagina with strongly sclerotized linings. Vulva situated much anterior to mid-body, because of long tail. (ref. ID; 1311)
  • Male: Males not found. (ref. ID; 1311)

    Measurements

    Body length 1287+/-107.8(1131-1434) µm, maximum body width 33+/-2.8(29-37) µm, pharyngeal length measured from the anterior end 210+/-3.4(204-213) µm, tail length 554+/-47.2(493-616) µm, anal body width 20+/-0.8(20-22) µm, lip region width 19+/-0.8(18-20) µm, long cephalic seta length 12+/-0.8(11-13) µm, short cephalic seta length 4+/-0.5(4-5) µm, length of anterior genital branch 58+/-16.1(39.0-82.5) µm, length of posterior genital branch 85+/-16.4(69-112) µm, amphid anterior body end 40+/-0.5(39-40) µm, first body setae anterior body end 24+/-0.8(23-25) µm, nerve ring from the anterior end 81+/-1.3(80-83) µm, cardia width 12+/-0.7(11-13) µm, corresponding body width 29+/-1.0(28-30) µm, rectal length 14+/-2.5(11-18) µm, amphid anterior body end/lip region width 2.1+/-0.1(2.0-2.2). (ref. ID; 1311)