Brasergasilus bifurcatus sp Nov (Copepoda, Ergasilidae, Abergasilinae) fromthe gills and nasal fossae of serrasalmid fishes from the Tres Marias reservoir, upper Sao Franciscoriver, Minas Gerais State, Brazil
Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) isdescribed. Specimens of the new species were collected from the gills and nasal fossae of theserrasalmid fishes, known as “piranhas”, Pygocentrus piraya (Cuvier, 1819) and “pirambebas”,Serrasalmus brandtii (Lutken, 1875).The fishes were netted in the Tres Marias Reservoir (18 degrees12′59 ” S, 45 degrees 17′34 ” W) of the upper Sao Francisco River, Minas Gerais State, Brazil.The new species differs from its congeners by the following characters: the specific setation on theantennule; the terminal barb of the antenna; the deeply bifurcate distal segment of the mandible;the chalice-shaped genital complex; a conspicuous external indentation of the second segment of thefirst endopod and a very short terminal segment of the first exopod.
Santos, MD　Thatcher, VE　Brasil-Sato, MC
Univ Fed Rural Rio De Janeiro, Curso Posgrad Ciencias Vet, BR-23851970Seropedica, RJ, Brazil; Univ Fed Parana, Dept Zool, BR-81531980 Curitiba, Parana, Brazil; UFRRJ,Dept Biol Anim, BR-23851970 Seropedica, RJ, Brazil
　Copepoda　 Ergasilidae　 Brasergasilus bifurcatus sp nov.　 fish　 Pygocentruspiraya　 Serrasalmus brandti　 Tres Marias Reservoir Sao Francisco River Brazil
