Brasergasilus mamorensis sp. n. (Copepoda: Ergasilidae) from the Nasal cavities of Hydrolycus pectoralis (Guenther, 1866) (Characiformes: Cynodontidae) from the Brazilian Amazon, and considerations about Abergasilinae

Abstract

-Brasergasilus mamorensis sp. n., collected from the nasal cavities of Hydrolycus pectoralis (Guenther, 1866) in the Mamoré River, Rondônia State, Brazil, is described. This is the first time that a species from the genus Brasergasilus has been collected in the nasal cavities. This new species is the only one that has a spine on the first segment of the antenna, a simple seta on the basipodites of the first three pairs of legs and one pair of vestigial legs (leg 5 ) on the sixth thoracic somite. RESUMO -Brasergasilus mamorensis sp. n. é descrito. Foi coletado das fossas nasais deHydrolycus pectoralis (Guenther, 1866) no rio Mamoré, Estado de Rondônia, Brasil. Esta é a primeira vez que uma espécie do gênero Brasergasilus é coletada parasitando as fossas nasais de seu hospedeiro. A nova espécie é a única que apresenta um espinho no primeiro segmento da antena, uma seta simples nos basipóditos dos três primeiros pares de pernas e um par de pernas vestigiais (perna 5) no sexto somito torácico.Palavras-chave: Copepoda, Poecilostomatoida, parasita de peixes, rio Mamoré.

Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) from the gills and nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil

“…nov. is the only species of its genus to have been found both on the gill filaments and within the nasal fossae of serrasalmid fishes. B. jaraquensis was found on the gills of a prochilodontid S. insignis, from the Solimo #es River, Amazonas State (Thatcher and Boeger 1983); B. anodus and B. oranus were found on the branchial filaments of the hemiodontid A. elongatus, from the Tocantins River, Pará State and the Amazon River, Amazonas State, respectively (Thatcher andBoeger 1983, 1984); B. guaporensis was from the gills of an anostomid L. fasciatus, of the Guaporé River of Rondônia State (Malta 1995) and B. mamorensis was from the nasal fossae of a cynodontid H. pectoralis, of the Mamoré River, Rondônia State (Varella and Malta 2001).…”