MONOGENEANS OF LEATHERJACKETS, OLIGOPLITES SPP (OSTEICHTHYES, CARANGIDAE), WITH THE DESCRIPTION OF A NEW SPECIES OF METACAMOPIA (MONOGENEA,ALLODISCOCOTYLIDAE) FROM THE COAST OF THE STATE OF RIO-DE-JANEIRO, BRAZIL

Metacamopia oligoplites n. sp., a gill filament parasite of carangid f ishes of three species of Oligoplites Gill, O. palometa (Cuvier), O. s aurus (Bloch & Schneider), and O. saliens (Bloch), from the coast of t he State of Rio de Janeiro, Brazil, is described and illustrated Metac amopia oligoplites n. sp. differs from M. indica by: the shape of the body; the pre-, para-, and post-germarial testes; vaginas lacking scle rotized structures, well-developed seminal receptacles, muscular sleev es around the constriction between the vaginas and the seminal recepta cles; and the haptor highly asymmetric, with a large, heel-like area; and differs from M. chorinemi by: the esophagus lacking diverticles; a larger number of testes (26-55) and not just, approximately 10; and t he vaginas lacking sclerotized structures of any kind. This is the fir st, record of Metacamopia in the South Atlantic Ocean. The generic dia gnosis of Metacamopia is emended. Hargicola oligoplites is reported fo r the first time in the South Atlantic Ocean. Oligoplites palometa and O. saliens are new host records for Hargicola oligoplites.