Abstract

One new species of the genus Prionchulus (Cobb, 1916) and two known ones of the genera Clarkus Jairajpuri, 1970 and Coomansus Jairajpuri & Khan, 1977 collected from Olang forest in the northern part of Iran are described and illustrated. Prionchulus iranicus sp. n. is characterized by the medium size of body (L=2.27-2.67 mm), thick-walled buccal cavity (43.5-46 µm long × 28-31 µm wide), protruding cephalic papillae, relatively anterior position of dorsal tooth, didelphic female reproductive apparatus with symmetrical and reflexed ovaries, absence of advulval papillae and a short tail (100-132.5 µm). An identification key for the Iranian Prionchulus species as well as descriptions and additional morphometrics are given for females of Clarkus papillatus (Bastian, 1865) and Coomansus parvus (de Man, 1880).