Parent taxon: Gastropoda according to P. Bouchet et al. 2005
See also Beesley 1998, Gingerich 1987, Miquel and Bellosi 2010 and Shoshani et al. 1989
Sister taxa: Achatina, Acteonoidea, Admetidae, Alamirifica, Alectrionidae, Amphigastropoda, Archaeobranchia, Architectonicidae, Auroraella, Beekmanoceras, Bellerophontida, Brachycerithium, Briardia, Bucardites, Buccinites, Bulimella, Bulimulidae, Bulimus, Bullaea, Caenogastropoda, Capulus sellardsi, Catubrina, Cavolinioidea, Chartrionella, Chippewaella, Chlathrus, Chrysodomidae, Chuchleconus, Cithna, Clathromangelia, Cocculiniformia, Cyclostoma, Deroceras, Dextrobranchia, Dicathais, Dicosmus, Doliidae, Dorcasiidae, Elmira, Eogastropoda, Eunerinea, Fruiticicoiidae, Gadinidae, Galeodea schencki, Galericulus, Geinitzia, Geinitzia carinata, Globulitopa, Gordenella, Gryphellina, Hecatastoma, Helicarionoidea, Helicidae, Helicites, Helictes, Helminthoglyptidae, Holyneconcha, Hyalaea, Hyrcania, Isaea, Iteria, Jeffreysia, Juliidae, Liris, Lovonemetrida, Luoguella, Luoguispira, Lymnaea, Lysechinus, Lysechinus incongruens, Mahajangina, Mathildidae, Microceras, Microcochlis, Mitrularia, Monotigma, Neomphaliones, Neptuneidae, Nerinea, Neritaemorpha, Neritimorpha, Neritites, Notodelphinula, Opisthobranchia, Opisthonematidae, Orthogastropoda, Oxychilus, Patellogastropoda, Patelloidea, Pectinibranchia, Pejona, Peraubium, Permoplanorboidea, Phorus, Pitonnellus, Planorboidea, Platyostomella, Platystoma, Plectopyloidea, Plicatusidae, Polygyridae, Pragoserpulinidae, Prasinidae, Prosobranchia, Pseudobrochidium, Pseudotylostoma, Ptenoglossa, Pteronotus, Pteropoda, Pupillacea, Pyramidellidae, Pythia, Rhytidopilidae, Rotellina, Rugoplanorboidella, Scalariidae, Serpulopsis, Spiraxidae, Spirgvaleia, Streptoneura, Stuorilda, Subulinidae, Suprazonalia, Taeniodomus, Thatcheriidae, Tirolthilda, Tornatella, Tortifusus, Toxonema, Tripartella, Trochifusus, Trochiletes, Trochopsis, Trochotremaria, Trochulus, Urocoptidae, Valvata, Vespertilio, Vetigastropoda, Wellingtonia, Zlichovia
Subtaxa: Basommatophora Basommatophora Bernicia Cerastidae Ceriidae Discidae Enoidea Oleacinidae
Ecology: epifaunal