Acanthostomoides apophalliformis Szidat, 1956 (additional source)
Acanthostomum gnerii Szidat, 1954 accepted as Proctocaecum gnerii (Szidat, 1954) Lamothe-Argumedo & Ponciano-Rodriguez, 1986 (additional source)
Allocreadium patagonicum Shimazu, Urawa & Coria, 2000 (additional source)
Allocreadium pichi Floress, Brugni & Ostrowskt de Núñez, 2004 (additional source)
Auriculostoma macrorchis (Szidat, 1954) Scholz, Aguirre-Macedo & Choudhury, 2004 accepted as Creptotrema macrorchis (Szidat, 1954) Franceschini, Aguiar, Zago, de Oliveira Fadel Yamada, Bertholdi Ebert & da Silva, 2021 (additional source)
Auriculostoma platense (Szidat, 1954) Scholz, Aguirre-Macedo & Choudhury, 2004 accepted as Creptotrema platense (Szidat, 1954) Franceschini, Aguiar, Zago, de Oliveira Fadel Yamada, Bertholdi Ebert & da Silva, 2021 (additional source)
Bacciger astyanactis Lunaschi, 1998 (additional source)
Bacciger delvalleensis Lunaschi, 2001 (additional source)
Chalcinotrema platense (Lunaschi, 1984) Overstreet & Curran, 2005 (additional source)
Chalcinotrema salobrensis Teixeira de Freitas, 1947 accepted as Chalcinotrema salobrense Teixeira de Freitas, 1947 (additional source)
Crassicutis cichlasomae Manter, 1936 (additional source)
Crassicutis intermedia (Szidat, 1954) Bray, de Chambrier & Vaucher, 1996 (additional source)
Crassicutis intermedius (Szidat, 1954) Bray, de Chambrier & Vaucher, 1996 accepted as Crassicutis intermedia (Szidat, 1954) Bray, de Chambrier & Vaucher, 1996 (additional source)
Creptotrema creptotrema Travassos, Artigas & Pereira, 1928 (additional source)
Creptotrema lynchi Brooks, 1976 accepted as Creptotrema creptotrema Travassos, Artigas & Pereira, 1928 (additional source)
Creptotrema pati Lunaschi, 1985 (additional source)
Creptotrematina dispar (Teixeira de Freitas, 1941) Manter, 1962 (additional source)
Creptotrematina dissimilis (Teixeira de Freitas, 1941) Yamaguti, 1954 (additional source)
Curumai curumai Travassos, 1961 (additional source)
Dadaytrema gracilis Lunaschi, 1989 accepted as Dadaytrema gracile Lunaschi, 1989 (additional source)
Dadaytrema oxycephala (Diesing, 1836) Vaz, 1932 accepted as Dadaytrema oxycephalum (Diesing, 1850) Vaz, 1932 (basis of record)
Dadaytremoides parauchenipteri Lunaschi, 1989 accepted as Doradamphistoma parauchenipteri (Lunaschi, 1989) Pantoja, Scholz, Luque & Jones, 2019 (additional source)
Deropegus patagonicus (Szidat, 1956) Shimazu, Urawa & Coria, 2000 accepted as Thometrema patagonicum (Szidat, 1956) Lunaschi & Drago, 2001 (additional source)
Dinurus barbatus (Cohn, 1902) Looss, 1907 (additional source)
Dinurus breviductus Looss, 1907 (additional source)
Forticulcita platana Andres, Curran, Fayton, Pulis & Overstreet, 2015 (additional source)
Genarchella fragilis Lunaschi, 1990 (additional source)
Genarchella genarchella Travassos, Artigas & Pereira, 1928 (additional source)
Genarchella parva Travassos, Artigas & Pereira, 1928 (additional source)
Genarchella szidati (Yamaguti, 1971) Hamann, 1991 accepted as Genarchella genarchella Travassos, Artigas & Pereira, 1928 (additional source)
Glypthelmins pseudium (Mañé-Garzón & Holcman-Spector, 1967) Travassos, Freitas & Kohn, 1960 (additional source)
Homalometron papilliferum (Szidat, 1956) Ostrowski de Nuñez, Brugni & Viozzi, 2000 (additional source)
Homalometron pseudopallidum Martorelli, 1986 (additional source)
Hymenocotta manteri Overstreet, 1969 (additional source)
Kalipharynx piramboae Boeger & Thatcher, 1983 (additional source)
Lecithaster confusus Odhner, 1905 (additional source)
Lecithaster intermedius Szidat, 1954 (additional source)
Lobatostoma jungwirthi Kritscher, 1974 (additional source)
Magnivitellinum corvitellinum Lacerda, Takemoto & Pavanelli, 2009 (additional source)
Megacoelium plecostomi Szidat, 1954 (additional source)
Microrchis oligovitellinum Lunaschi, 1987 accepted as Microrchis oligovitellum Lunaschi, 1987 (basis of record)
Neocladocystis intestinalis (Vaz, 1932) Manter & Pritchard, 1969 (additional source)
Palaeocryptogonimus claviformis Szidat, 1954 (additional source)
Parspina argentinensis (Szidat, 1954) Sogandares-Bernal, 1959 (additional source)
Parspina carapo Ostrowski de Nunez, Arredondo & Gil de Pertierra, 2011 (additional source)
Parspina pimelodellae Arredondo & Ostrowski de Núñez, 2013 (additional source)
Parspina virescens Ostrowski de Nunez, Arredondo & Gil de Pertierra, 2011 (additional source)
Phyllodistomum mugilis Knoff & Amato, 1992 (additional source)
Phyllodistomum spatula Odhner, 1902 (additional source)
Plehniella coelomicola Szidat, 1951 (additional source)
Porangatus ceteyus Fernandes, Malta & Morias, 2013 (additional source)
Posterotestes unelen Ostrowski de Nûñez, Brugni & Flores, 2003 (additional source)
Procaudotestis uruguayensis Szidat, 1954 (additional source)
Prosorhynchoides cambapuntaensis Lunaschi, 2004 (additional source)
Prosorhynchoides rioplatensis (Szidat, 1970) Lunaschi, 2003 (additional source)
Prosthenhystera obesa (Diesing, 1850) Travassos, 1922 (additional source)
Pseudosellacotyla lutzi (Teixeira de Freitas, 1941) Yamaguti, 1954 (additional source)
Rhipidocotyle santanaensis Lunaschi, 2004 (additional source)
Saccocoelioides antonioni Lunaschi, 1984 accepted as Saccocoelioides antonioi Lunaschi, 1984 (basis of record)
Saccocoelioides bacilliformis Szidat, 1973 accepted as Saccocoelioides octavus Szidat, 1970 (additional source)
Saccocoelioides carolae Lunaschi, 1984 (additional source)
Saccocoelioides elongatus Szidat, 1954 (additional source)
Saccocoelioides magniovatus Szidat, 1954 (additional source)
Saccocoelioides magnus Szidat, 1954 (additional source)
Saccocoelioides nanii Szidat, 1954 (additional source)
Saccocoelioides octavus Szidat, 1970 (additional source)
Saccocoelioides quintus Thatcher, 1978 (additional source)
Saccocoelioides szidati Travassos, Freitas & Kohn, 1969 (additional source)
Sanguinicola argentinensis Szidat, 1951 (additional source)
Steganoderma Stafford, 1904 (additional source)
Steganoderma macrophallus Szidat & Nani, 1951 (additional source)
Steganoderma szidati Viozzi, Flores & Ostrowski de Nuñez, 2000 (additional source)
Stomachicola lycengraulidis Tanzola & Seguel, 2012 (additional source)
Thometrema bonariensis Lunaschi, 1989 accepted as Thometrema bonariense Lunaschi, 1989 (additional source)
Thometrema magnifica (Szidat, 1954) Gibson & Bray, 1979 accepted as Thometrema magnificum (Szidat, 1954) Gibson & Bray, 1979 (additional source)
Thometrema overstreeti (Brooks, Mayes & Thorson, 1979) Lunaschi, 1989 (additional source)
Travassosinia dilatata (Daday, 1907) Vaz, 1932 (additional source)
Xiha fastigata (Thatcher & Sparks, 1958) Andres, Curran, Fayton, Pulis & Overstreet, 2015 (additional source)
Zonocotyle bicaecata Travassos, 1947 (additional source)

Amazonas for Kalipharynx piramboae Boeger & Thatcher, 1983 
Argentina for Thometrema overstreeti (Brooks, Mayes & Thorson, 1979) Lunaschi, 1989 
Argentina Northeast for Dinurus breviductus Looss, 1907 
Buenos Aires for Lecithaster confusus Odhner, 1905 
Buenos Aires for Lecithaster intermedius Szidat, 1954 
Buenos Aires for Stomachicola lycengraulidis Tanzola & Seguel, 2012 
Buenos Aires for Zonocotyle bicaecata Travassos, 1947 
Chaco for Kalipharynx piramboae Boeger & Thatcher, 1983 
Chubut for Steganoderma szidati Viozzi, Flores & Ostrowski de Nuñez, 2000 
Corrientes for Curumai curumai Travassos, 1961 
Corrientes for Pseudosellacotyla lutzi (Teixeira de Freitas, 1941) Yamaguti, 1954 
Entre Ríos for Porangatus ceteyus Fernandes, Malta & Morias, 2013 
Misiones for Pseudosellacotyla lutzi (Teixeira de Freitas, 1941) Yamaguti, 1954 
Rio Negro for Steganoderma Stafford, 1904 
Rio Negro for Steganoderma szidati Viozzi, Flores & Ostrowski de Nuñez, 2000 
Santa Fé for Curumai curumai Travassos, 1961 

 Taxonomic remark

 for Dinurus barbatus (Cohn, 1902) Looss, 1907

Listed as a syn. of Dinurus breviductus by Ostrowski de Nunez et al. (2017). [details]

 Taxonomic remark

 for Kalipharynx piramboae Boeger & Thatcher, 1983

Kalipharynx Boeger & Thatcher, 1983 is considered as genus incertae sedis by Pojmańska et al. (2008). [details]

 Taxonomy

 for Genarchella szidati (Yamaguti, 1971) Hamann, 1991

Listed as a synonym of Genarchella parva. [details]

 Taxonomy

 for Kalipharynx Boeger & Thatcher, 1983

Considered a genus incertae sedis by Pojmańska et al. (2008). [details]

 Taxonomy

 for Saccocoelioides bacilliformis Szidat, 1973

Recognised as a good species by Ostrowski de Núñez et al. (2017). [details]