de Man, 1876
Definition: Leptolaiminae. Cuticle transversely striated
with an occasional bristle here and there. Head offset, without lips,
papillae or setae. Lateral fields narrow. Amphids circular,
situated a short distance behind head constriction. Stoma in
form of a narrow, straight-sided tube lined with delicate rods. Oesophagus
almost cylindrical in shape, narrowing to an isthmus and then expanding
to terminal bulb. Apparently no oesophageal-intestinal valve cells
present. Rectum short. Tail in both sexes tapering to terminus
which is in form of a swollen knob carrying opening of caudal glands.
Vulva slightly pre-equatorial; gonads paired, opposed and reflexed.
Spicules slightly arcuate, knobbed anteriorly, shafts tapering to sharp
points. Gubernaculum about 1/2 as long as spicules, bifurcate for
a short distance under points of spicules. A row of 22-25 mid-ventral
pre-anal supplements present, the 4 just in front of anus being tubular
ducts of gland cells, the remaining supplements, which extend forward to
the region of the terminal bulb of the oesophagus, being boss-like and
somewhat ovoid when seen in face view. On the male tail are 4 pairs
of subventral setae.
Type species: Leptolaimus papilliger de Man, 1876