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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Rhabdolaimus

Rhabdolaimus De Man, 1880 (ref. ID; 3571) or 1884 (ref. ID; 2592)

Araeolaimida De Coninck & Stekhoven, 1933: Family Rhabdolaimidae Chitwood, 1951 (ref. ID; 3571)

Order Chromadorida: Family Rhabdolaimidae (ref. ID; 6862)

Order Chromadorida (ref. ID; 6180)

Family Plectidae (ref. ID; 880)

Family Rhabdolaimidae (ref. ID; 6182, 6740)

ref. ID; 1663

Prominent long, conical spinneret; stoma tubular. Common species. (ref. ID; 1663)

ref. ID; 1923

Stoma long and narrow; anteriorly armed or unarmed; amphids circular to minute, transversely oval or porelike, subcephalic; esophagus terminated by muscular swelling, chromadoroid; esophago-intestinal valve elongated with modification to intestine; supplementary organs apparently absent. (ref. ID; 1923)

ref. ID; 3571

Type species

Rhabdolaimus terrestris De Man, 1880 (ref. ID; 3571)

ref. ID; 6153, 6859

Bacterivore. (ref. ID; 6153, 6859)
  1. Rhabdolaimus aquaticus De Man, 1880 (ref. ID; 3571) reported year? (ref. ID; 1774, 1861)
    See; Rhabdolaimus terrestris (ref. ID; 3571)
  2. Rhabdolaimus balatonicus Daday, 1894
    See; Plectus parvus (ref. ID; 3571)
  3. Rhabdolaimus brachyuris Meyl, 1954 (ref. ID; 3571)
  4. Rhabdolaimus minor Cobb, 1914 (ref. ID; 3571) reported author and year? (ref. ID; 1923)
  5. Rhabdolaimus nannus (Hoeppli, 1926) De Coninck, 1935 (ref. ID; 3571)
    Syn; Chromadora nanna Hoeppli, 1926 (ref. ID; 3571)
  6. Rhabdolaimus stigmatus (ref. ID; 1750)
  7. Rhabdolaimus terrestris De Man, 1880 (ref. ID; 880, 1311, 3571) or 1884 (ref. ID; 2592)
    Syn; Rhabdolaimus aquaticus De Man, 1880 (ref. ID; 3571)

Rhabdolaimus terrestris De Man, 1880 (ref. ID; 880, 1311, 3571) or 1884 (ref. ID; 2592)

Synonym

Rhabdolaimus aquaticus De Man, 1880 (ref. ID; 3571)

Descriptions

Small nematodes. Body after fixation, either straight or curved ventrad. Cuticle with transverse striae, but without somatic setae. Six labial and four cephalic papillae on the lip region seen on SEM pictures. Lip region continuous with the rest of the body. Stoma three to four lip region widths long, well sclerotized, usually curved. In the anterior end of the stoma are situated three small denticles, one dorsal and two ventrosublateral. Amphidial aperture slit-like, situated at around one and one-half lip region width from the anterior end. Pharynx with refractive lumen, and terminating in a muscular bulb that has well developed valves. Nerve ring slightly posterior to middle of pharynx. Ventral gland and excretory pore not seen. Pharyngo-intestinal junction simple i.e. the intestine directly joining the pharynx. Rectum slightly smaller than one anal body width. Tail long, slightly more than 11 times rectal length, consistently tapering up to the terminal spinneret. Caudal glands obscure. Female reproductive system didelphic, amphidelphic, with obscurely reflexed ovaries. Vulva with serrated lips (SEM) and situated anterior to mid-body. (ref. ID; 1311)

Measurements

Body length 302+/-18.2(284-337) µm, maximum body width 15+/-1.4(13-17) µm, pharyngeal length measured from the anterior end 80+/-3.2(75-84) µm, tail length 114+/-14(93-136) µm, anal body width 11+/-0.7(10-12) µm, lip region width 7+/-0.5(6-7) µm, stoma length 24 µm, length of anterior genital branch 34+/-13.6(20-60) µm, length of posterior genital branch 45+/-9.0(26-52) µm, spinneret length 6+/-0.7(5-7) µm, amphid anterior body end 9+/-1.2(8-11) µm, corresponding body width 9+/-1.1(7-9) µm, nerve ring from the anterior end 45+/-1.9(43-49) µm, rectal length 10+/-1.5(8-12) µm. (ref. ID; 1311)