Revision of the Genus Tylencholaimus De Man, 1876. General Discussion and Key To the Species

Abstract

General aspects of the morphology and taxonomy of the genus Tylencholaimus de Man, 1876 are described and discussed. The variability and taxonomic importance of several morphological features are evaluated. Intrageneric relationships are also analyzed but no division is proposed due to the impossibility of distinguishing clear natural groups; a list of the species included in the genus and a key to their identification are given. Relationships with other close genera are briefly discussed; Pseudotylencholaimus (Jairajpuri & Ahmad, 1992) n. grad. is proposed and P. viduus (Jairajpuri, 1965) Jairajpuri & Ahmad, 1992 is described and illustrated.