Abstract
Two new species of diplogastrid nematodes from India are described and
illustrated. Diplogasteroides uriceus sp. n. has a medium-sized body,
monoprodelphic reproductive system lacking a post-uterine sac, anteriorly
directed muscular vagina and vulva located far posterior; long, slender,
arcuate spicules; gubernaculum with proximal thread-like flexible part and
nine pairs of genital papillae of which four pairs are precloacal and five
pairs postcloacal. The new species resembles D. crassus but can be most
easily differentiated by the structure of the cheilorhabdions, shape and
structure of the gubernaculum, arrangement of the genital papillae and the
complete absence of a bursa. The new species also resembles D. proprius but
can be differentiated by stoma structure, more anteriorly located vulva,
longer spicules, gubernaculum shape and tail form. Rhabditidoides papillatus
sp. n. is characterised by the presence of three pairs of post-deirids in
the lateral fields, posteriorly curved tubular stoma, amphidelphic female
reproductive system, strongly developed, arcuate spicules with bilobed
capitulum and a slender gubernaculum provided with a sleeve distally and
anteriorly directed bifid ends proximally. It can be distinguished from R.
stigmatus by the structure of the spicule head, gubernaculum shape and
arrangement of the genital papillae; from R. mastigurus by spicule structure
and the gubernaculum shape; and from R. quercophilus by a more slender
female body, stoma structure, absence of a male bursa, spicule form and
arrangement of the genital papillae.