Acanthostomum Looss, 1899 (identification resource)
Acanthostomum absconditum (Looss, 1901) Gohar, 1934 accepted as Proctocaecum absconditum (Looss, 1901) Lamothe-Argumedo & Ponciano-Rodriguez, 1986 (redescription)
Acanthostomum imbutiforme (Molin, 1859) Gohar, 1934 accepted as Timoniella imbutiforme (Molin, 1859) Brooks, 1980 accepted as Timoniella imbutiformis (Molin, 1859) Brooks, 1980 (redescription)
Acanthostomum spiniceps (Looss, 1896) Looss, 1899 (redescription)
Anisocladium Looss, 1902 (identification resource)
Anisocladium fallax (Rudolphi, 1819) Looss, 1902 (redescription)
Anisocoelium Lühe, 1900 (identification resource)
Anisocoelium capitellatum (Rudolphi, 1819) Lühe, 1900 (redescription)
Gymnophallidae Odhner, 1905 (identification resource)
Gymnophalloides Fujita, 1925 (identification resource)
Gymnophallus Odhner, 1900 (identification resource)
Gymnophallus affinis Jameson & Nicoll, 1913 (redescription)
Gymnophallus choledochus Odhner, 1900 (redescription)
Gymnophallus deliciosus (Olsson, 1893) Odhner, 1900 (redescription)
Gymnophallus ovoplenus Jameson & Nicoll, 1913 (redescription)
Gymnophallus somateriae (Levinsen, 1881) Odhner, 1900 (redescription)