SUMMARY
Kalipharynx piramboae gen. et sp. n. (Trematoda: Fellodistomidae) is described from the Amazonian lung fish, locally known as the "piramboia", Lepidosiren paradoxa (Dipnoi: Lepidosirenidae). The new genus differs from all other genera in the family by having a large, muscular pharynx, with anterior digitiform projections. Among the genera of this family, Kalipharynx is more similar to Heterorchis Baylis, 1915, from which it differs by having: 1) A larger acetabulum; 2) A small, terminal excretory pore; 3) An undivided, sacular seminal vesicle; and 4) A different genus of host from a different continent. K. piramboae is the first adult trematode to be reported from L. paradoxa.