Tylencholaimus teres Thorne 1939

Tylencholaimus teres Thorne, 1939.

Two females. Dimensions: L = 0.83 -0.98 mm; a = 26-3 1; b = 3.9-4.1; c = 57- 67; V = 1 55913 " 14.

Body slightly curved ventrad in death. Cuticle with conspicuous radial striae. Outer layer of cuticle smooth, inner with irrelugar transverse striae and in mounted specimens wrinkled, loosened irregularly from outer layer. Lateral chord broad, smooth, with a few marginal pores. Lip region cap-like with somewhat convex sides, offset by a shallow constriction; the inner papillae hardly protruding. Length of odontostyle 6 \L, i.e. about four-fifths of width of lip region, the aperture occupying one-third of its length. Basal portion 8.0 - 8.5 \L long, knobbed. Amphids relatively narrow. Oesophagus slender in its anterior part, expanding gradually at about 55-60 % of its length; the posterior part is three-fifths as wide as body and 5-6 x as long as wide. The dorsal gland empties into the lumen anterior to the level where the oesophagus attains its full width, the distance DO- DN is 6 [x or 2.6- 2.8 % of neck length. Vulva transverse, vagina not sclerotized, nearly halfbody width deep. Gonads two, opposed, reflexed less than halfway; no sperm; in one specimen a constriction between oviduct and uterus is visible. Tail shorter than anal body diameter, broadly rounded. Rectum slightly longer than anal body width, prerectum twice as long as rectum.

Samples 56 and 66.