PSEUDORHABDOSYNOCHUS CAPURROI SP. N. (MONOGENEA, DIPLECTANIDAE) FROM THE GILLS OF MYCTEROPERCA-BONACI (PISCES, SERRANIDAE) OF THE YUCATAN PENINSULA, MEXICO

A new monogenean species, Pseudorhabdosynochus capurroi sp. n., is des cribed from the gills of the black grouper, Mycteroperca bonaci (Poey) (Serranidae), from the Yucatan Peninsula, Mexico. The new species can be differentiated from all other known species of Pseudorhabdosynochu s Yamaguti, 1958 by being the largest one recorded until now (1162-153 5 mu m body length). Moreover, the vagina of P. capurroi has a small f unnel-shaped opening with a non sclerotized vesicle from which a fine sclerotized duct leads proximally to a sclerotized seminal receptacle, and the testis is bilobate. The squamodiscs have 14 to 16 rows of rod s, of which 3 to 5 rows are closed.