A New Species of the Genus Crassolabium Yeates, 1967 (Nematoda: Dorylaimidae: Labronematinae) from India

Crassolabium dhritiae sp. n. has been described from Deccan Peninsular Biogeographic Zone, Keonjhar District, Odisha State, India (21017 / 53 // N, 85050 / 46 // E). The new species is characterised by its medium size and moderately slender body, rounded amalgamated lip region, wide and moderately longer odontostyle (about six times of odontostyle width or 1.2–1.4 times of lip-region width) with aperture occupying slightly less than the half to about one-third of the odontostyle, long pharynx (1/3.5 to 1/3.8 of body length), presence of pars refringens vaginae, presence of two round gland cells near vulva on both sides of vagina, short convex-conoid and ventrally straight tail with round terminus.

Crassolabium dhritiae sp. n. can be differentiated from all other species of the genus except C. brachycephalum, C. circuliferum, C. diversum, C. montanum, C. rhopalocercum and two Indomalayan species C. aenigmaticum and C. vietnamense in having a well-marked longer pharynx in female.