Genarchella parva Travassos, Artigas & Pereira, 1928

Genarchella tropica (Manter, 1936) Szidat 1954 nec Derogenes tropicus Manter, 1936

Genarchella szidati (Yamaguti, 1971) .

For more synonyms see Lunaschi (1990) and Kohn et al. (2007).

Material deposited: CHIOC (type material), MACN- Pa 604, 605 (new voucher material).

Hosts: Oligosarcus sp. (= Acestrorhamphus sp.) (type host, Brazil), Oligosarcus jenynsii, O. hepsetus (Cuvier), Charax gibbosus (Linnaeus) (= Cynopotamus gibbosus Valenciennes) ( Characidae: Characidae), Salminus brasiliensis, Triportheus paranensis, Astyanax sp., A. bimaculatus [= Poeciloristhys bimaculatus (Linnaeus)], A. eigenmaniorum (Cope), A. fasciatus, Cheirodon interruptus Jenyns, Hyphessobrycon meridionalis Ringuelet, Miquelarena & Menni, Jenynsia multidentata [= J. lineata (Jenyns)] ( Cyprinodontiformes: Anablepidae), Ageneiosus militaris *, Auchenipterus nigripinnis, A. osteomystax (= A. nuchalis), Leporinus obtusidens, Loricariichthys anus (Valenciennes) (= Loricaria anus Valenciennes) ( Siluriformes: Loricariidae), Luciopimelodus pati, Pimelodus albicans, P. argenteus, P. maculatus, P. ornatus Kner, Pseudoplatystoma corruscans (Spix & Agassiz) *, Pimelodella gracilis, Pimelodella mucosa Eigenmann & Ward (= Pimelodella howesi Fowler), Rhamdia quelen (= R. sapo).

Localities: Emas Pirassununga, São Paulo State, Brazil (type locality); Paraná River (Puerto Italia), Corrientes City, Corrientes Province; Colastiné River** (tributary of Paraná River), Santa Fe Province; Saladita Lagoon (Avellaneda), Cantera (quarry) Aprilito (Ensenada), Doña Flora Stream (Ensenada), Miguelín Stream (Ensenada), Cantera (quarry) Los Talas (Berisso), Chascomús and Chis-Chis Lagoons (Chascomús) and Luján River (Luján), Buenos Aires Province; La Plata River in front of Buenos Aires City.

Site of infection: Stomach.

References: Szidat (1954), Hamann (1989), Lunaschi (1990), Gil de Pertierra & Ostrowski de Núñez (1995), Drago (1997), Arredondo (2013).

Remarks: New hosts and locality records. Referred to as Genarchella szidati Yamaguti, 1971 by Hamann (1989). Hamann (1989) indicated that the records of Genarchella parva in Auchenipterus nuchalis, Jenynsia lineata and Pimelodella howesi, in Argentina probably correspond to A. osteomystax, J. multidentata and P. mucosa, respectively (see Liotta, 2005; Aguilera & Azpelicueta, 2015; Froese & Pauly, 2016).