Asotana magnifica n. sp. (Isopoda, Cymothoidae) an unusual parasite (commensal?) of the buccal cavities of piranhas (Serrasalmus sp.) from Roraima, Brazil.
Asotana magnifica sp. nov. is described from the buccal cavities of piranhas (Serrasalmus sp.) from the Territory of Roraima, Brazil. The species was based on 2 adult females and an additional aberrant female was also studied. A table compares the new species with the 2 species already known in this genus. These isopods are not pathogenic and it is thought that they feed on already digested material regurgitated periodically by the host. It is suggested that for this reason, and in spite of their large size, they might be commensals rather than parasites. This is the 3rd report of this genus and the first for Brazil.