A new species of the genus Calodorylaimus (Nematoda, Dorylaimida) from highly mineralised rivers of the Elton Lake basin, Russia

Abstract

A new species of free-living nematode (Calodorylaimus salinus sp. nov.), found in sediment of the highly mineralised rivers of the Elton lake basin (Russia), is described and illustrated. This species is close to C. mongolicus Andrássy, 1988, but differs from the latter in having a wider labial region, a stouter tail in females and a greater number of separate precloacal supplements in males. A dichotomic key for identification of valid species of the genus CalodorylaimusAndrássy, 1986 is given. Calodorylaimus densus Andrássy, 1988 is assigned to the genus Laimydorus Siddiqi, 1969.