Parspina carapo Ostrowski de Núñez, Arredondo & Gil de Pertierra, 2011

Material deposited: MACN-Pa (type material).

Host: Gymnotus sp. (type host) ( Gymnotiformes: Gymnotidae) (see remarks).

Localities: Paraná-Guazú River, Entre Ríos Province (type locality); Colastiné River (tributary of Paraná River), Santa Fe Province.

Site of infection: Middle and posterior part of intestine.

Reference: Ostrowski de Núñez et al. (2011b).

Remarks: Ostrowski de Núñez et al. (2011b) studied the tegument surface of the species, which was compared with that of Parspina argentinensis . Ostrowski de Núñez et al. (2011b) indicated the presence of P. carapo in Gymnotus carapo, but according to Froese & Pauly (2016) and Casciotta et al. (2013) this species is not present in continental waters of Argentina.