The genus Basiria Siddiqi, 1959 (Nematoda: Tylenchidae) IV. General discussion, genus diagnosis and key to the species.

General morphological aspects of the genus Basiria Siddiqi, 1959 are described and discussed. The variability and taxonomic importance of several morphological f'eatures are evaluated. Body, tail and stylet length which have been uscd Ibr differentiation of some species are considered to be variable characters. The position of the median bulb (MB ratio) and the number of lateral lines are the most reliable characters Ior Basiria species differentiation. The shape of basal bulb and head, position of the dorsal oesophageal gland orifice, and the tail shape (in specres with short and conical tail) are also to some extent reliable. The diagnosis of Basiria is emended and close relationships with other genera are briefly discussed. The list of 35 species included in the genus and a key to therr identification are provided.