• Adenogaster indica Rao, 1975
• Adenogaster ocadiae (Oshmarin & Zharikova, 1984)
• Adenogaster selfi (Fischthal & Kuntz, 1975)
• Adenogaster serialis Looss, 1901
• Alassostoma magnum Stunkard, 1917 accepted as Allassostoma magnum Stunkard, 1916
• Allassostoma magnum Stunkard, 1916
• Allassostoma parvum Stunkard, 1916 accepted as Allassostomoides parvus (Stunkard, 1916) Stunkard, 1924
• Allassostoma venezuelensis Cordero & Vogelsang, 1940 accepted as Nematophila venezuelensis (Cordero & Vogelsang, 1940) Yamaguti, 1958
• Allassostomoides Iouisianaensis Christian & White, 1973
• Allassostomoides parvus (Stunkard, 1916) Stunkard, 1924
• Allassostomoides stunkardi (Holl, 1929) Skrjabin, 1949 accepted as Pisciamphistoma stunkardi (Holl, 1929) Yamaguti, 1954
• Alphamphistoma canoeforma Thatcher & Jégu, 1996 accepted as Alphamphistoma canoeformum Thatcher & Jégu, 1996
• Alphamphistoma canoeformum Thatcher & Jégu, 1996
• Amurotrema dombrowskajae Akhmerov, 1959
• Amurotrema spinibarbi Zhang et al., 1985
• Anavilhanatrema robusta Thatcher, 1992 accepted as Anavilhanatrema robustum Thatcher, 1992
• Anavilhanatrema robustum Thatcher, 1992
• Angiodictyum anteroporum Chattopadhyaya, 1972 (uncertain > taxon inquirendum)
• Angiodictyum dejesusi Eduardo & Diaz, 2008
• Angiodictyum glossoides Blair, 1986
• Angiodictyum longum Blair, 1986
• Angiodictyum mooreae Dyer, Williams & Bunkley-Williams, 1995
• Angiodictyum parallelum (Looss, 1901) Looss, 1902
• Angiodictyum posterovitellatum Chattopadhyaya, 1972
• Angiodictyum undulatum Eduardo & Diaz, 2008
• Annelamphistoma elegans Thatcher, Sey & Jégu, 1996
• Arthurloossia loossi Nagaty, 1954 accepted as Hexangium loossi (Nagaty, 1954) Yamaguti, 1958 accepted as Hexangium sigani Goto & Ozaki, 1929
• Aspidocotylus cochleariformis Diesing, 1838 (uncertain > taxon inquirendum)
• Aspidocotylus mutabilis Diesing, 1839 (uncertain > taxon inquirendum)
• Astrorchis renicapite (Leidy, 1856) Poche, 1926 accepted as Pyelosomum renicapite (Leidy, 1856) Ruiz, 1946
• Astrorchis sphargis (MacCallum, 1921) accepted as Pyelosomum renicapite (Leidy, 1856) Ruiz, 1946
• Australotrema brisbanense Khalil, 1981
• Australotrema brisbanensis Khalil, 1981 accepted as Australotrema brisbanense Khalil, 1981
• Bancroftrema neoceratodi Angel, 1966
• Barisomum candibulum (Linton, 1910) Price, 1931 accepted as Barisomum candidulum (Linton, 1910) Price, 1931 accepted as Pleurogonius candidulus (Linton, 1910) Manter, 1947
• Barisomum candidulum (Linton, 1910) Price, 1931 accepted as Pleurogonius candidulus (Linton, 1910) Manter, 1947
• Barisomum erubescens Linton, 1910 accepted as Pyelosomum erubescens (Linton, 1910)
• Basidiodiscus ectorchis Fischthal & Kuntz, 1959
• Betamphistoma jariense Thatcher & Jégu, 1996
• Brevicaecum niloticum McClelland, 1957
• Buckarootrema goodmani Platt & Brooks, 2001
• Buckarootrema minuta Snyder & Tkach, 2006 accepted as Buckarootrema minutum Snyder & Tkach, 2006
• Buckarootrema minutum Snyder & Tkach, 2006
• Caballerodiscus resupinatus (Caballero y C., 1940)
• Caballerodiscus tabascensis (Caballero y C. & Sokoloff, 1934) Sey, 1988
• Caballeroia bhavani (Achan, 1956) Deveraj, 1972
• Caballeroia indica Thapar, 1960
• Calicophoron calicophorum (Fischoeder, 1901)
• Calicophoron microbothrioides Price & McIntosh, 1944
• Catadiscus bathracorum Cordero, 1926
• Catadiscus cohni Travassos, 1926
• Catadiscus corderoi Mañé-Garzón, 1958
• Catadiscus dolichocotyle (Cohn, 1903) Cohn, 1904
• Catadiscus eldoradiensis Artigas & Pérez, 1964
• Catadiscus freitaslenti Ruiz, 1943
• Catadiscus hylae Incorvaia, 1983
• Catadiscus inopinatus Freitas, 1941
• Catadiscus longicoecalis Paumarau, 1965
• Catadiscus marinholutzi Freitas & Lent, 1939
• Catadiscus mirandai Freitas, 1943
• Catadiscus pomaceae Hamann, 1992
• Catadiscus propinguus Freitas & Dobbin, 1956
• Catadiscus pygmaeus (Lutz, 1928) Freitas & Lent, 1939
• Catadiscus rochai Correa & Artigas, 1978
• Catadiscus rodriguezi Caballero, 1955
• Catadiscus uruguayensis Freitas & Lent, 1939
• Catatropis charadrii Skrjabin, 1915
• Catatropis chilinae Flores & Brugni, 2003
• Catatropis cygni Yamaguti, 1939
• Catatropis harwoodi Bullock, 1952
• Catatropis hisikui Yamaguti, 1939
• Catatropis indicus Srivastava, 1935
• Catatropis johnstoni Martin, 1956
• Catatropis onobae Gonchar & Galaktionov, 2020
• Catatropis orientalis Harshe, 1932
• Catatropis pacifera Noble, 1933 accepted as Notocotylus pacifera (Noble, 1933) Harwood, 1939
• Catatropis verrucosa (Frölich, 1789) Odhner, 1905
• Catatropis vietnamensis Izrailskaia, Besprozvannykh, Tatonova, Nguyen & Ngo, 2019 (unaccepted)
• Centroderma spinosissima (Stossich, 1883) Lühe, 1901
• Centroderma stossichianum (Monticelli, 1892) Skrjabin, 1963 accepted as Elstia stossichianum (Monticelli, 1892) Bray, 1984
• Cetiosaccus galapagensis Gilbert, 1938
• Cetiosaccus gilberti Mehrotra & Gupta, 1975
• Cetiosaccus gilberti Mehrotra, 1973 (unaccepted > nomen nudum)
• Charaxicephaloides polyorchis Groschaft & Tenora, 1978
• Charaxicephaloides striatus Santoro, 2006 (unaccepted > nomen nudum)
• Charaxicephalus loossi Mehra, 1939
• Charaxicephalus robustus Looss, 1901
• Chiorchis burti Prudhoe, 1944 accepted as Neocladorchis burti (Prudhoe, 1944) Skrjabin, 1949 accepted as Pseudochiorchis burti (Prudhoe, 1944) Yamaguti, 1958 accepted as Stunkardia burti (Prudhoe, 1944)
• Chiorchis dilatatus Daday, 1907 accepted as Travassosinia dilatata (Daday, 1907) Vaz, 1932
• Chiorchis fabaceus (Diesing, 1838) Fischoeder, 1901
• Chiorchis groschafti Coy Otero, 1989 accepted as Chiorchis fabaceus (Diesing, 1838) Fischoeder, 1901
• Chiorchis purvisi Southwell & Kirshner, 1937 accepted as Quasichiorchis purvisi (Southwell & Kirshner, 1937) Skrjabin, 1949
• Chiostichorchis rarus Rohde, 1963 accepted as Pseudallastomoides rarus (Rohde, 1963) Yamaguti, 1971
• Choanophorus rovirosai Caballero, 1942
• Cichlasotrema ujati Pineda-López & Andrade-Salas, 1989 accepted as Octangioides ujati (Pineda-López & Andrade-Salas, 1989) Blair, 2005
• Cladorchis helostomatis MacCallum, 1905 accepted as Helostomatis helostomatis (MacCallum, 1905) Travassos, 1934
• Cladorchis heteroxenus Cordero & Vogelsang, 1940 accepted as Pseudallossostoma heteroxenum (Cordero & Vogelsang, 1940) Yamaguti, 1958 accepted as Halltrema heteroxenum (Cordero & Vogelsang, 1940) Jones, 2005
• Cladorchis pangasii MacCallum, 1905 accepted as Protocladorchis pangasii (MacCallum, 1905) Willey, 1935
• Cleptodiscus bulbosus Hanson, 1955
• Cleptodiscus havanensis (Vigueras, 1940) Nahhas & Cable, 1964 accepted as Macrorchitrema havanense Vigueras, 1940