Prosthenhystera obesa (Diesing, 1850)

Distomum obesum Diesing, 1850

Pseudoprosthenhystera microtesticulata Kloss, 1966

Material deposited: MLP, NHM (type material).

Hosts: Salminus brasiliensis (= S. brevidens Cuvier), Leporinus friderici (Bloch) (type host not assigned, Brazil) ( Characiformes: Anostomidae), Luciopimelodus pati *, Pimelodus albicans *.

Localities: Mato Grosso State, Brazil (type locality); Colastiné River** (tributary of Paraná River), Santa Fe Province; Delta of Paraná River, Buenos Aires Province; Irigoyen Canal, Talavera Island, Buenos Aires Province; La Plata River** in front of Buenos Aires City.

Site of infection: Gall bladder.

References: Diesing (1950), Lunaschi & Sutton (1995), Arredondo (2013).

Remarks: New hosts and locality records. Kohn et al. (1997) redescribed this species from Brazil parasitizing a wide range of hosts.