| Species | Name Used |
|---|---|
| Bianium plicitum (Linton, 1928) | Bianium plicitum (p. ) |
| Derogenes varicus (Müller, 1784) | Derogenes varicus (p. ) |
| Emprosthopharynx opisthoporus Bock, 1913 | Emprosthopharynx opisthoporus (p. ) |
| Hamacreadium mutabile Linton, 1910 | Hamacreadium mutabile (p. ) |
| Helicometra fasciata (Rudolphi, 1819) | Helicometra fasciata (p. ) |
| Hirudinella ventricosa (Pallas, 1774) | Hirudinella ventricosa (p. ) |
| Lecithochirium microstomum Chandler, 1935 | Lecithochirium microstomum (p. ) |
| Neohexostoma euthynni (Meserve, 1938) | Neohexostoma euthynni (p. ) |
| Orchidasma amphiorchis (Braun, 1899) | Orchidasma amphiorchis (p. ) |
| Prosorhynchus ozakii Manter, 1934 | Prosorhynchus ozakii (p. ) |
| Schikhobalotrema acutum (Linton, 1910) | Schikhobalotrema acutum (p. ) |
| Stephanostomum casum (Linton, 1910) | Stephanostomum casum (p. ) |
| Tagia ecuadori (Meserve, 1938) | Tagia ecuadori (p. ) |
| Zeuxapta seriolae (Meserve, 1938) | Zeuxapta seriolae (p. ) |