Two new species of free-living nematodes of the family Dorylaimidae (Nematoda, Dorylaimida) from small freshwater bodies of Vietnam

Abstract

Illustrated descriptions of two new species of free-living nematodes found in sediments of small water bodies of Vietnam are presented. Laimydorus propinquus sp. n. is morphologically similar to L. papillatus Ahmad, Ahmad, 2002, but it is distinguished from it by a relatively longer and thicker body, a longer tail in females, a more anterior position of vulva, a longer prerectum in females, longer spicules, and large number of precloacal supplements in males. Ischiodorylaimus paracognatus sp. n. differs from the similar species I. cognatus Andrássy, 1983 by a longer body, relatively short pharynx, thicker cuticle, wider lip area, and shorter spicules.