Tylencholaimus proximus Thorne, 1939

P. A. A. LOOF, 1971, FREELIVING AND PLANT PARASITIC NEMATODES FROM SPITZBERGEN, COLLECTED BY MR. H. VAN ROSSEN, Mededelingen Landbouwhogeschool Wageningen 71, pp. 1-86 : 82-83

Tylencholaimus proximus Thorne, 1939

( Fig. 30 ).

Dimensions:

Females (n = 22): L = 0.59 mm (0.45 -0.71); a = 18 -24; b = 3. 1-4.4; c = 23 - 3 1; V = " - 2 66 3 - 68.

Male (n = 1): L = 0.56 mm; a = 24; b = 3.2; c = 27; VD = ^ó11.

Body nearly straight in death. Lip region offset by constriction, cap-like, the inner papillae protruding distinctly. Outer layer of cuticle smooth, inner with fine transverse striae and in mounted specimens somewhat irregularly wrinkled and loosened from outer layer. Oesophagus widened gradually at about 60 % of its length from head end. Length of odontostyle 6 -7 \L, of basal portion 8 -10 \L. In some females a very short posterior uterine sac appears to be present. Tail symmetrically conoid in the female, with broadly rounded tip: its length 0.9-1.3 anal body widths. Rectum about as long as anal body width, prerectum thrice as long. No sperm in gonad.

Male body curved ventrad in posterior third. Testes two, dorylaimid, but possibly non-functional, as no sperm is present. Spicules dorylaimid, 28 jx long (along axis). Apart from the adanal pair there is a series of two ventromedian supplements, spaced 13 \x apart, the posterior one 42 \ ior two tail lengths from the anus. Tail dorsally conoid, tip round, less blunt than in the female. Lateral guiding pieces not seen.

Samples 17, 18, 25, 26, 38, 52 and 62; the male in sample 18.

Figures

FIG. 30. Tylencholaimus proximus Thome, male tail.