Acanthostomoides apophalliformis Szidat, 1956 Material deposited: IPCAS,MACN-Pa (type material), NSMT-PI, UNC. Hosts: Percichthys trucha (type host), P. colhuapiensis, Galaxias maculatus, Oncorhynchus mikiss (Walbaum), Salmo trutta (Linnaeus) (Salmoniformes: Salmonidae), Olivaichthys viedmensis (MacDonagh) (= Diplomystes viedmensis MacDonagh) (Siluriformes: Diplomystidae). Life cycle: IH1 Heleobia hatcheri (Pilsbry, 1911); IH2 Galaxias maculatus. Localities: Limay River, Río Negro Province (type locality); Araucarian Region of the Andean Patagonia (see list of lakes and rivers in Ostrowski de Núñez et al., 1999). Site of infection: Intestine. References: Szidat (1956b), Ostrowski de Núñez et al. (1999), Shimazu et al. (2000), Revenga et al. (2006a, b).

Published as part of Margarita Ostrowski de Núñez, Nathalia J. Arredondo & Alicia A. Gil de Pertierra, 2017, Adult Trematodes (Platyhelminthes) of freshwater fishes from Argentina: a checklist, pp. 91-113 in Revue suisse de Zoologie 124 (1) on page 97, DOI: 10.5281/zenodo.1040686