Trypanosomes of brazilian fishes . X. Trypanosoma garavelloi sp. N. From rhamdia hilaru valenciennes 1840 ( pisces, pimmelodidae ) - Lopes, R A; Ribeiro, R D; Santos, H S L; Oliveira, C.; Zuim, S M F; Satake, T (Revista Regional de Ciencias, 1992)