Two new species of the family Tobrilidae (Nematoda: Triplonchida) from West Bengal, India

Abstract

The article presents the first records of the genera Epitobrilus Tsalolikhin, 1981 and Eutobrilus Tsalolikhin, 1981 (Triplonchida: Tobrilidae), along with the description of two new species, Epitobrilus brachystomus sp. nov. and Eutobrilus minutus sp. nov., from paddy fields in West Bengal, India. Epitobrilus brachystomus sp. nov. differs from the congeners in having a relatively shorter stoma, distinct crustaformeria cells at the oviduct–uterus junction, five to six setae including a subterminal one in the tail region, and a longer tail with a distinct cuticular protrusion at the tip. Eutobrilus minutus sp. nov. can be distinguished from Eu. husmanni (Altherr, 1958) by the differences in the body size, the distance between the stomatal pockets, the tail length, and the presence of a subterminal setae. From another closely related species, Eu. nothus Gagarin, 1989, it differs in the ratio of the body length to the tail length (c), the tail length relative to its diametre (c′), the distance from the vulva to the anterior body end (V %), and in the distance between the stomatal pockets.