Gastropoda Cuvier, 1797
Baptodorididae
Clionidae Rafinesque, 1815
Cliopsidae Costa, 1873
Homoiodorididae
Hydromylidae Pruvot-Fol, 1942
Laginiopsidae Pruvot-fol, 1926
Miamiridae
Notobranchaeidae Pelseneer, 1886
Pneumodermatidae Latrielle, 1825
Polyceratidae
Thliptodontidae Kwietniewski, 1910
Vayssiereidae Vaught, 1989
