Auriculostoma macrorchis (Szidat, 1954)

Crepidostomum macrorchis Szidat, 1954

Material deposited: MACN-Pa 583, 584/1‒2, 585/1‒3, 586/1‒2 (type and new voucher material).

Hosts: Pachyurus bonariensis Steindachner (type host) ( Perciformes: Scienidae); Ageneiosus inermis (Linnaeus), Ageneiosus militaris* Valenciennes, Auchenipterus nigripinnis (Boulenger), Auchenipterus osteomystax (Miranda Ribeiro) [= Auchenipterus nuchalis (Spix and Agassiz)] ( Siluriformes: Auchenipteridae), Luciopimelodus pati * (Valenciennes) ( Siluriformes: Pimelodidae), Rhinodoras dorbignyi * (Kner) riformes: Doradidae).

(Silu-

Localities: La Plata River, Buenos Aires City (type locality); Middle Paraná River, Corrientes Province; Colastiné River** (tributary of the Paraná River) (31°40´S, 60°46´W), Santa Fe Province; Paraná-Guazú River** (33°54´S; 58°52´W), Entre Ríos Province.

Site of infection: Anterior, middle and posterior part of intestine.

References: Szidat (1954), Hamann (1988), Scholz et al. (2004), Arredondo (2013).

Remarks: New hosts and localities records. Hamann (1988) indicated the presence of A. macrorchis in A. nuchalis, but according to Liotta (2005) and to Froese & Pauly (2016), the records of this species probably correspond to A. osteomystax .