Parent taxon: Gastropoda according to C. S. Cataldo 2017
See also Amano and Little 2014, Beesley 1998, Bouchet et al. 2005, Bouchet et al. 2017, Harzhauser 2004, Harzhauser 2007, Knight et al. 1960, Lozouet et al. 2001, Nützel and Cook 2002, Petuch 1992, Ponder and Warén 1988, Saul and Squires 1998, Schnetler et al. 2024, Squires 1999, Squires 1999, Squires 2011, Squires 2013, Squires and Saul 2001, Squires and Saul 2003, Vega et al. 2006 and Ward 1992
Sister taxa: Achatina, Acteonoidea, Admetidae, Alamirifica, Alectrionidae, Amalthea, Amphigastropoda, Archaeobranchia, Architectonicidae, Auroraella, Beekmanoceras, Bellerophontida, Brachycerithium, Briardia, Bucardites, Buccinites, Bulimella, Bulimulidae, Bulimus, Bullaea, 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, Gundlachia, Hecatastoma, Helicarionoidea, Helicidae, Helicites, Helictes, Helminthoglyptidae, Holyneconcha, Hyalaea, Hyalinia, 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, Patellogastropoda, Patelloidea, Pectinibranchia, Pejona, Peraubium, Permoplanorboidea, Phorus, Pitonnellus, Planorboidea, Platyostomella, Platystoma, Plectopyloidea, Pleurotomaria verticillata, Pleurotomaria verticillata, Pleurotomaria viola, Plicatusidae, Polygyridae, Pragoserpulinidae, Prasinidae, Prosobranchia, Pseudobrochidium, Pseudotylostoma, Ptenoglossa, Pteronotus, Pteropoda, Pulmonata, 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, Turbo guadalupensis, Turbo texana, Urocoptidae, Valvata, Vespertilio, Vetigastropoda, Wellingtonia, Zlichovia
Subtaxa: Architaenioglossa Carinomphalus Cassianozyga Cataldia Cerithiacea Cerithimorpha Cerithioidea Coelodiscidae Coelostylinidae Cyclophoracea Dendropupoidea Dzikella Epitonioidea Idahospira Loxotomella Meekospiridae Mesogastropoda Neontaenioglossa Neotaenioglossa Orthonematoidea Palaeostyloidea Peruneloidea Perunelomorpha Pragoscutulidae Prisconatica Pseudomelanoidea Soleniscoidea Sorbeoconcha Spanionematidae Strobeidae Trinema Vanikoroidea Ventrosia Zygopleuroidea