description of four species of tylenchidae örley, 1880 (nematoda: tylenchomorpha) with two new records from iran

during a nematological survey, nineteen known species of plant-parasitic nematodes belonging to the family tylenchidae (tylenchomorpha: tylenchoidea) were collected and identified from different localities of west azerbayjan and kermanshah provinces, iran. among them two species, namely discotylenchus attenuatus and tylenchus bhitaii, are new records for iranian nematode fauna, the male of t. bhitaii is recorded for the first time. also, two previously reported species filenchus quartus and tylenchus stachys are illustrated and described. descriptions, morphometric data, line drawings and microscopic photographs are provided.