A new species of Parastenhelia Thompson & A. Scott, 1903 (Copepoda, Harpacticoida, Parastenheliidae) from Turkey

Both sexes of P. aydini sp. nov. are described in detail. The new species can be differentiated from its congeners by the combination of following features; i) 2-segmented P5 exopod with total of five setae in the male, ii) 9-segmented antennule, iii) spinular rows near outer margin of the basis of P1-P4 significantly reduced, iv) P4 enp-3 with four setae, v) inner terminal seta of caudal rami (seta V) not swollen at the base. It is concluded that the insufficient descriptions of many species are the main obstacle in testing the monophyletic status of several genera in the family Parastenheliidae.