Studies on dorylaimellus cobb, 1913 and Nygellus thorne, 1939 (Nematoda: Dorylaimoidea) with descriptions of three new species

Abstract

Three new species of Dorylaimoidea belonging to the genera Dorylaimellus and Nygellus are described. Dorylaimellus basiri n. sp., 1.2-1.5 mm long; spear less than head-width long; spear extension about four times as long as spear; only three cuticularized pieces situated around vestibule; reproductive organs amphidelphic and tail conoid, ventrally arcuate, about five anal-body-widths long. Dorylaimellus parvus n. sp., 0.6-0.7 mm long; cuticle coarsely striated; spear less than head-width long; spear extension more than twice spear length; four cuticularized pieces situated around vestibule; reproductive organs amphidelphic and tail about three anal-body-widths long. Nygellus mozammili n. sp., 1.2-1.4 mm long; reproductive organs opisthodelphic; anterior uterine sac about half body-width long and tail clavate, about one and a half anal-body-widths long. A key to the species of Nygellus is also provided.