Acanthostomum marajoarum (Freitas & Lent, 1938) Carter & Etges, 1972 accepted as Caimanicola marajoara Freitas & Lent, 1938 (basis of record)
Acanthostomum scyphocephalum (Braun, 1899) Hughes, Higginbotham & Clary, 1941 accepted as Proctocaecum scyphocephalum (Braun, 1899) Lamothe-Argumedo & Ponciano-Rodriguez, 1986 accepted as Timoniella scyphocephala (Braun, 1899) Brooks, 1980 (additional source)
Adenogaster serialis Looss, 1901 (additional source)
Aliptrema Ruiz & Leão, 1955 (basis of record)
Aliptrema riberoi Ruiz & Leão, 1955 (basis of record)
Allopharynx Shtrom, 1928 (basis of record)
Allopharynx daileyi Bursey, Goldberg & Vitt, 2005 (basis of record)
Amphiorchis caborojoensis Fischthal & Acholonu, 1976 (additional source)
Amphiorchis indicus Mehrotra, 1973 (additional source)
Amphiorchis solus (Simha & Chattopadhyaya, 1970) Platt, 2002 (additional source)
Brachycoelium Dujardin, 1845 (basis of record)
Brachycoelium mesocoeliiformis Teixeira de Freitas, 1961 accepted as Brachycoelium salamandrae (von Frölich, 1789) Lühe, 1909 (source of synonymy)
Brachycoelium salamandrae (von Frölich, 1789) Lühe, 1909 (basis of record)
Caimanicola brauni (Mañé-Garzón & Gil, 1961) Brooks, 1980 (additional source)
Caimanicola marajoara Freitas & Lent, 1938 (additional source)
Carettacola stunkardi (Martin & Bamberger, 1952) Dailey, Fast & Balazs, 1991 (additional source)
Catadiscus cohni Travassos, 1926 (additional source)
Catadiscus corderoi Mañé-Garzón, 1958 (additional source)
Catadiscus dolichocotyle (Cohn, 1903) Cohn, 1904 (additional source)
Catadiscus eldoradiensis Artigas & Pérez, 1964 (additional source)
Catadiscus freitaslenti Ruiz, 1943 (additional source)
Catadiscus hylae Incorvaia, 1983 (additional source)
Catadiscus inopinatus Freitas, 1941 (additional source)
Catadiscus longicoecalis Paumarau, 1965 (additional source)
Catadiscus marinholutzi Freitas & Lent, 1939 (additional source)
Catadiscus mirandai Freitas, 1943 (additional source)
Catadiscus propinguus Freitas & Dobbin, 1956 (additional source)
Catadiscus pygmaeus (Lutz, 1928) Freitas & Lent, 1939 (additional source)
Catadiscus rochai Correa & Artigas, 1978 (additional source)
Catadiscus uruguayensis Freitas & Lent, 1939 (additional source)
Cetiosaccus galapagensis Gilbert, 1938 (additional source)
Creptotrema lynchi Brooks, 1976 accepted as Creptotrema creptotrema Travassos, Artigas & Pereira, 1928 (additional source)
Cricocephalus albus (Kuhl & van Hasselt, 1822) Looss, 1899 (additional source)
Diplodiscus pygmaeus Lutz, 1928 accepted as Catadiscus pygmaeus (Lutz, 1928) Freitas & Lent, 1939 (basis of record)
Distoma pyxidatum Bremser in Rudolphi, 1819 (basis of record)
Distomum xenodontis Cordero & Vogelsang, 1928 accepted as Opisthogonimus lecithonotus Lühe, 1900 (source of synonymy)
Glypthelmins biliaris Suriano, 1968 (basis of record)
Glypthelmins festina Cordero, 1944 (additional source)
Glypthelmins parva Travassos, 1924 (additional source)
Glypthelmins sanmartini (Mañé-Garzón & Holcman-Spector, 1974) (basis of record)
Gorgodera australiensis Johnston, 1912 (basis of record)
Gorgoderina carioca Fernandes, 1958 (basis of record)
Gorgoderina cedroi Travassos, 1924 (basis of record)
Gorgoderina chilensis Dioni, 1947 (additional source)
Gorgoderina cryptorchis Travassos, 1924 (basis of record)
Gorgoderina darwini Mañé-Garzón & Gonzáles, 1978 (basis of record)
Gorgoderina diaster Lutz, 1926 (basis of record)
Gorgoderina festoni Mata-López, 2005 (basis of record)
Gorgoderina megacysta Mañé-Garzón & Gonzáles, 1978 (basis of record)
Gorgoderina parvicava Travassos, 1922 (additional source)
Gorgoderina parvicava minuta Tantaleán & García, 1993 (basis of record)
Gorgoderina pigulevskyi Fernandes, 1958 (basis of record)
Gorgoderina rochalimai Pereira & Cuocolo, 1940 (basis of record)
Gorgoderina valdiviensis Puga, 1979 (additional source)
Haematoloechus arequipensis Ibañez & Córdova, 1979 (basis of record)
Haematoloechus freitasi Mañé-Garzón & Gil Solares, 1961 (basis of record)
Haematoloechus fuelleborni (Travassos & Darriba, 1930) Ingles, 1933 (basis of record)
Halipegus dubius Klein, 1905 (additional source)
Halltrema avitellina Lent & Teixeira de Freitas, 1939 accepted as Halltrema avitellinum Lent & Teixeira de Freitas, 1939 (additional source)
Halltrema heteroxenum (Cordero & Vogelsang, 1940) Jones, 2005 (additional source)
Haplometroides buccicola Odhner, 1910 (additional source)
Haplometroides intercaecalis Silva, Ferreira & Strüssmann, 2007 (basis of record)
Haplometroides odhneri Ruiz & Perez, 1959 (basis of record)
Iguanacola navicularis Gilbert, 1938 (additional source)
Infidum infidum (Gomes de Faria, 1910) Travassos, 1916 (basis of record)
Iquitos Mañé-Garzón & Gil, 1963 (basis of record)
Iquitos ceii Mañé-Garzón & Gil, 1963 (basis of record)
Learedius learedi Price, 1934 (additional source)
Liophistrema Artigas, Ruiz & Leão, 1943 (basis of record)
Liophistrema buccalis Holcman-Spector & Mañé-Garzón, 1973 (basis of record)
Liophistrema pulmonalis Artigas, Ruiz & Leão, 1943 accepted as Liophistrema pulmonale Artigas, Ruiz & Leão, 1943 (basis of record)
Loefgrenia loefgreni Travassos, 1920 (additional source)
Loxogenes macrocirra (Caballero & Bravo-Hollis, 1949) Yamaguti, 1958 accepted as Langeronia macrocirra Caballero & Bravo-Hollis, 1949 (basis of record)
Maicuru Freitas, 1900 (basis of record)
Maicuru solitarium Freitas, 1960 (basis of record)
Margeana sanmartini Mañé-Garzón & Holcman-Spector, 1974 accepted as Glypthelmins sanmartini (Mañé-Garzón & Holcman-Spector, 1974) (basis of record)
Mesocoelium lanfrediae Gomes, Melo, Giese, Furtado, Gonçalves & Santos, 2013 (basis of record)
Mesocoelium meggitti Bhalerao, 1927 (additional source)
Mesocoelium monas (Rudolphi, 1819) Teixeira de Freitas, 1958 (additional source)
Mesocoelium sibynomorphi Ruiz & Leão, 1943 (basis of record)
Mesocoelium waltoni Pereira & Cuocolo, 1940 (basis of record)
Metacetabulum invaginatum Teixeira de Freitas & Lent, 1938 (additional source)
Monticellius indicum Mehra, 1939 accepted as Monticellius indicus Mehra, 1939 (additional source)
Nematophila argentinum (Cordero & Vogelsang, 1940) Lenis & Vélez, 2011 (additional source)
Nematophila grandis (Diesing, 1839) Travassos, 1934 (additional source)
Nematophila venezuelensis (Cordero & Vogelsang, 1940) Yamaguti, 1958 (additional source)
Neoctangium travassosi Ruiz, 1943 (additional source)
Neodeuterobaris Brooks, 1976 (additional source)
Neodeuterobaris pritchardae Brooks, 1976 (additional source)
Octangioides Price, 1937 (additional source)
Octangioides tlacotalpensis Caballero y C., 1942 (additional source)
Opisthogonimus afranioi Pereira, 1929 (additional source)
Opisthogonimus artigasi Ruiz & Leao, 1942 (additional source)
Opisthogonimus fariai Leão & Ruiz, 1943 (basis of record)
Opisthogonimus fonsecai Ruiz & Leao, 1942 (additional source)
Opisthogonimus interrogativus (Nicoll, 1914) Pereira, 1929 (additional source)
Opisthogonimus lecithonotus Lühe, 1900 (additional source)
Opisthogonimus megabothrium Pereira, 1928 (additional source)
Opisthogonimus misionesensis Lunaschi & Drago, 2001 (basis of record)
Opisthogonimus pereirai Ruiz & Leao, 1942 (additional source)

Argentina for Caimanicola brauni (Mañé-Garzón & Gil, 1961) Brooks, 1980 
Argentina for Catadiscus corderoi Mañé-Garzón, 1958 
Argentina for Catadiscus dolichocotyle (Cohn, 1903) Cohn, 1904 
Argentina for Catadiscus freitaslenti Ruiz, 1943 
Argentina for Catadiscus hylae Incorvaia, 1983 
Argentina for Catadiscus inopinatus Freitas, 1941 
Argentina for Catadiscus longicoecalis Paumarau, 1965 
Argentina for Catadiscus marinholutzi Freitas & Lent, 1939 
Argentina for Catadiscus propinguus Freitas & Dobbin, 1956 
Argentina for Catadiscus uruguayensis Freitas & Lent, 1939 
Argentina for Glypthelmins biliaris Suriano, 1968 
Argentina for Gorgodera australiensis Johnston, 1912 
Argentina for Gorgoderina cryptorchis Travassos, 1924 
Argentina for Gorgoderina parvicava Travassos, 1922 
Argentina for Gorgoderina rochalimai Pereira & Cuocolo, 1940 
Argentina for Halipegus dubius Klein, 1905 
Argentina for Haplometroides buccicola Odhner, 1910 
Argentina for Mesocoelium monas (Rudolphi, 1819) Teixeira de Freitas, 1958 
Argentina for Mesocoelium sibynomorphi Ruiz & Leão, 1943 
Argentina for Nematophila argentinum (Cordero & Vogelsang, 1940) Lenis & Vélez, 2011 
Argentina for Nematophila grandis (Diesing, 1839) Travassos, 1934 
Argentina for Opisthogonimus artigasi Ruiz & Leao, 1942 
Argentina for Opisthogonimus fonsecai Ruiz & Leao, 1942 
Argentina for Opisthogonimus interrogativus (Nicoll, 1914) Pereira, 1929 
Argentina for Opisthogonimus lecithonotus Lühe, 1900 
Argentina for Opisthogonimus megabothrium Pereira, 1928 
Argentina for Opisthogonimus misionesensis Lunaschi & Drago, 2001 
Argentina for Opisthogonimus serpentis Artigas, Ruiz & Leao, 1943 
Argentina for Styphlodora condita Faria, 1911 
Argentina for Telorchis clava (Diesing, 1850) Lühe, 1899 
Argentinean part of the South Atlantic Ocean for Orchidasma amphiorchis (Braun, 1899) Looss, 1900 
Brazil for Acanthostomum scyphocephalum (Braun, 1899) Hughes, Higginbotham & Clary, 1941 
Brazil for Aliptrema riberoi Ruiz & Leão, 1955 
Brazil for Allopharynx daileyi Bursey, Goldberg & Vitt, 2005 
Brazil for Brachycoelium salamandrae (von Frölich, 1789) Lühe, 1909 
Brazil for Caimanicola marajoara Freitas & Lent, 1938 
Brazil for Catadiscus cohni Travassos, 1926 
Brazil for Catadiscus dolichocotyle (Cohn, 1903) Cohn, 1904 
Brazil for Catadiscus eldoradiensis Artigas & Pérez, 1964 
Brazil for Catadiscus freitaslenti Ruiz, 1943 
Brazil for Catadiscus inopinatus Freitas, 1941 
Brazil for Catadiscus marinholutzi Freitas & Lent, 1939 
Brazil for Catadiscus mirandai Freitas, 1943 
Brazil for Catadiscus propinguus Freitas & Dobbin, 1956 
Brazil for Catadiscus rochai Correa & Artigas, 1978 
Brazil for Catadiscus uruguayensis Freitas & Lent, 1939 
Brazil for Distoma pyxidatum Bremser in Rudolphi, 1819 
Brazil for Glypthelmins parva Travassos, 1924 
Brazil for Gorgoderina carioca Fernandes, 1958 
Brazil for Gorgoderina cedroi Travassos, 1924 
Brazil for Gorgoderina cryptorchis Travassos, 1924 
Brazil for Gorgoderina festoni Mata-López, 2005 
Brazil for Gorgoderina parvicava Travassos, 1922 
Brazil for Gorgoderina pigulevskyi Fernandes, 1958 
Brazil for Gorgoderina rochalimai Pereira & Cuocolo, 1940 
Brazil for Haematoloechus freitasi Mañé-Garzón & Gil Solares, 1961 
Brazil for Haematoloechus fuelleborni (Travassos & Darriba, 1930) Ingles, 1933 
Brazil for Halipegus dubius Klein, 1905 
Brazil for Halltrema avitellina Lent & Teixeira de Freitas, 1939 
Brazil for Haplometroides buccicola Odhner, 1910 
Brazil for Infidum infidum (Gomes de Faria, 1910) Travassos, 1916 
Brazil for Liophistrema pulmonale Artigas, Ruiz & Leão, 1943 
Brazil for Loefgrenia loefgreni Travassos, 1920 
Brazil for Maicuru solitarium Freitas, 1960 
Brazil for Mesocoelium lanfrediae Gomes, Melo, Giese, Furtado, Gonçalves & Santos, 2013 
Brazil for Mesocoelium meggitti Bhalerao, 1927 
Brazil for Mesocoelium monas (Rudolphi, 1819) Teixeira de Freitas, 1958 
Brazil for Mesocoelium sibynomorphi Ruiz & Leão, 1943 
Brazil for Mesocoelium waltoni Pereira & Cuocolo, 1940 
Brazil for Nematophila grandis (Diesing, 1839) Travassos, 1934 
Brazil for Opisthogonimus afranioi Pereira, 1929 
Brazil for Opisthogonimus artigasi Ruiz & Leao, 1942 
Brazil for Opisthogonimus fariai Leão & Ruiz, 1943 
Brazil for Opisthogonimus fonsecai Ruiz & Leao, 1942 
Brazil for Opisthogonimus interrogativus (Nicoll, 1914) Pereira, 1929 
Brazil for Opisthogonimus lecithonotus Lühe, 1900 
Brazil for Opisthogonimus megabothrium Pereira, 1928 
Brazil for Opisthogonimus serpentis Artigas, Ruiz & Leao, 1943 
Brazil for Opisthogonimus sulina Artigas, Ruiz & Leao, 1943 
Brazil for Oriximinatrema noronhae Knoff, Brooks, Mullins & Gomez, 2012 
Brazil for Pachypsolus sclerops (Travassos, 1922) Travassos, 1928 
Brazil for Podocnemitrema papillosus Alho & Vicente, 1964 
Brazil for Proctocaecum dorsale Catto & Amato, 1993 
Brazil for Pseudotelorchis caimanis Catto & Amato, 1993 
Brazil for Pseudotelorchis yacarei Catto & Amato, 1993 
Brazil for Rauschiella linguatula (Rudolphi, 1819) Razo-Mendivil, León-Régagnon & Pérez-Ponce de León, 2006 
Brazil for Sticholecitha serpentis Prudhoe, 1949 
Brazil for Styphlodora condita Faria, 1911 
Brazil for Styphlodora gili Mañé-Garzón & Holcman-Spector, 1967 
Brazil for Telorchis parvus Braun, 1901 
Brazilian Exclusive Economic Zone for Amphiorchis caborojoensis Fischthal & Acholonu, 1976 
Brazilian Exclusive Economic Zone for Amphiorchis indicus Mehrotra, 1973 
Brazilian Exclusive Economic Zone for Amphiorchis solus (Simha & Chattopadhyaya, 1970) Platt, 2002 
Brazilian Exclusive Economic Zone for Carettacola stunkardi (Martin & Bamberger, 1952) Dailey, Fast & Balazs, 1991 
Brazilian Exclusive Economic Zone for Cricocephalus albus (Kuhl & van Hasselt, 1822) Looss, 1899 
Brazilian Exclusive Economic Zone for Learedius learedi Price, 1934 
Brazilian Exclusive Economic Zone for Monticellius indicum Mehra, 1939 
Brazilian Exclusive Economic Zone for Neoctangium travassosi Ruiz, 1943 
Brazilian Exclusive Economic Zone for Pleurogonius linearis Looss, 1901 
Brazilian Exclusive Economic Zone for Pleurogonius longiusculus Looss, 1901 

 Taxonomic remark

 for Pseudotelorchis devincenzii (Mañé-Garzón & Gil, 1961)

Considered synonym of Telorchis hagmanni Lent & Freitas, 1937 by Nasir (1974). [details]

 Taxonomic remark

 for Telorchis productus Mañé-Garzón & Gil, 1961

Considered synonym of Telorchis pleroticus (Braun, 1899) Braun, 1901 by Nasir (1974) [details]

 Taxonomy

 for Glypthelmins sanmartini (Mañé-Garzón & Holcman-Spector, 1974)

Razo-Mendivil, León-Règagnon & Ponce de León (2006) suggested the possible inclusion of this species in genus ... [details]

 Taxonomy

 for Halipegus similis Lutz, 1928

Considered synonym of Halipegus dubius Klein, 1905 by Cordero (1942), but is considered a nomen nudum by Fernandes ... [details]

 Taxonomy

 for Maicuru Freitas, 1900

Considered incertae sedis by Caira & Bogéa (2005) [details]

 Taxonomy

 for Maicuru solitarium Freitas, 1960

Considered incertae sedis by Caira & Bogéa (2005). [details]

 Taxonomy

 for Mesocoelium waltoni Pereira & Cuocolo, 1940

This species was considered synonym of M. monas by Freitas (1963) and revalidated by Dronen, Calhoun & Simcik (2012). [details]