Definition: Diplogasterinae. Cuticle may be clearly striated
longitudinally. Lip ring entire in 1 species, but is marked by fine
grooves in the others. The glottoid apparatus is only slightly anisoglottid.
The genus shows a gradual transition from 2 species with the dorsal metarhabdion
having a broad middle ridge and wart-like lateral ridges to the formation
of a large movable tooth and reduced side ridges. The small subventral
segments each bear a small ridge. The tail of both sexes is long
and fine. The vulva is median and the post-vulval body diameter is
less than the prevulval. The male has 9 or 10 pairs of caudal papillae,
of which 3 pairs are pre-anal. The trio group of the last 4 pairs is situated
within the bursal rudiments at the base of the tail thread.
Type species: Diplogasteritus nudicapitatus (Steiner, 1914)
(Description- Goodey, 1963)