THE GENUS COSLENCHUS SIDDIQI, 1978 (NEMATA: TYLENCHIDAE) FROM IRAN
AbstractSeven species belonging to the genus Coslenchus were found in soil samples collected from the rhizosphere of plants in cultivated or natural habitats in western Iran. C. japonicus Mizukubo et Minagawa, 1984 and C. polygyrus Bajaj et Bhatti, 1983 were found for the first time since their descriptions. These species, along with C. multigyrus Siddiqi, 1981, C. franklinae Siddiqi, 1981 and C. polonicus Brzeski, 1982, are new records for Iran. LM and SEM show the variable number of longitudinal lines in the lateral field of the first two species. Also the number of longitudinal ridges varies from 26 to 30 in C. polygyrus, and 19 to 26 in C. polonicus.