trypanosomes of brazilian fishes. ii. trypanosoma barrettoi sp. n. from hypostomus paulinus (siluriformes, loricariidae). | trypanosoma barrettoi sp.n. is described from the blood of the armored catfish hypostomas paulinus ihering, from the state of são paulo, brazil. the total length averages 40.22 microns, of which 14.22 microns is free flagellum. | 1990 | 2337249 |