Accacladocoelium macrocotyle (Diesing, 1858) Robinson, 1934 (redescription)
Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934 (additional source)
Aphanhystera Guiart, 1938 accepted as Otodistomum Stafford, 1904 (original description)
Aphanhystera monacensis Guiart, 1938 accepted as Otodistomum cestoides (Van Beneden, 1870) Odhner, 1911 (original description)
Botulus Guiart, 1938 (original description)
Botulus alepidosauri Guiart, 1938 accepted as Botulus microporus (Monticelli, 1889) Gibson & Bray, 1977 (original description)
Didymocystis lanceolata Guiart, 1938 accepted as Didymosulcus lanceolatus (Guiart, 1938) Pozdnyakov, 1990 (original description)
Didymocystis macrorchis Guiart, 1938 accepted as Didymosulcus macrorchis (Guiart, 1938) Pozdnyakov, 1990 (original description)
Hirudinella fusca (Bosc, 1802) Manter, 1926 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (redescription)
Hirudinella oxysoma Guiart, 1938 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (original description)
Hirudinella pallasii (Poirier, 1885) Guiart, 1938 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (new combination reference)
Hirudinella phalloidea Guiart, 1938 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (original description)
Hirudinella poirieri (Moniez, 1891) Dollfus, 1935 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (redescription)
Nematobothrium latum Guiart, 1938 (original description)
Otodistomum scymni (Risso, 1826) Guiart, 1938 accepted as Otodistomum veliporum (Creplin, 1837) Stafford, 1904 (new combination reference)
Sterrhurus magnacetabulum Guiart, 1938 accepted as Lecithochirium magnacetabulum (Guiart, 1938) (original description)