Varella 1995. Gamidactylus bryconis sp. n. (Copepoda, Poecilostomatoida, Vaigamidae) from the nasal fossae of fishes, Brycon pellegrini Holly, 1929 e B. melanopterus (Cope, 1872) from the Brazilian Amazon. Acta Amazonica, 24(1-2), Marco-Junho 1995: 145-152