Brachyphallus crenatus (Rudolphi, 1802) Odhner, 1905 (additional source)
Copiatestes Crowcroft, 1948 (identification resource)
Derogenes varicus (Müller, 1784) Looss, 1901 (redescription)
Ectenurus lepidus Looss, 1907 (redescription)
Gonocerca phycidis Manter, 1925 (additional source)
Hemiurata (identification resource)
Hemiurus communis Odhner, 1905 (additional source)
Hirudinella de Blainville, 1828 (identification resource)
Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (redescription)
Hirudinellidae Dollfus, 1932 (identification resource)
Lecithaster confusus Odhner, 1905 (additional source)
Lecithaster gibbosus (Rudolphi, 1802) Lühe, 1901 (additional source)
Lecithasterinae Odhner, 1905 (additional source)
Lecithocladium excisum (Rudolphi, 1819) Lühe, 1901 (redescription)
Ptychogonimidae Dollfus, 1937 (identification resource)
Ptychogonimus Lühe, 1900 (identification resource)
Ptychogonimus megastomus (Rudolphi, 1819) Lühe, 1900 accepted as Ptychogonimus megastomum (Rudolphi, 1819) Lühe, 1900 (redescription)
Sclerodistominae Odhner, 1927 (identification resource)
Sclerodistomum italicum (Stossich, 1893) Looss, 1912 (redescription)
Syncoeliidae Looss, 1899 (identification resource)
Syncoeliinae Looss, 1899 (identification resource)