Insulanema longispiculum gen. n., sp n. a new Carnoyidae (Nematoda: Rhigonematomorpha) from Phu Quoc Island, Vietnam

摘要

Insulanema longispiculum, a new genus and species of Carnoyidae (Rhigonematomorpha), is described from the hind gut of diplopod Apeuthes Attems, 1937 (Spirobolida: Trigoniulidae), collected on Phu Quoc Island in the Kien Giang Province, Vietnam. The new genus is characterised by the absence of any spines or other cuticular formations in the cervical region of both male and female, the presence of six cuticular pieces around the oral opening, the presence of a smooth cephalic cap and area rugosa in the male, very long isomorphic and isometric spicules, boat-shaped gubernaculum with a dorsal hole and 14 genital papillae with two postcloacal pairs subventral and one posteriormost pair subdorsal in the middle of conical part of the tail. Insulanema gen. n. could be easily distinguished from African and Australasian Camoyidae by the position of the last postcloacal pair of genital papillae and enormously long spicules in the male.