Parent taxon: Gastropoda according to W. Kiessling 2003
Sister taxa: Admetidae, Alaria, Altadema, Archaeobranchia, Auroraella, Bellerophontida, Bicuerda, Bucardites, Bulimella, Bulimus, Chartrionella, Chippewaella, Chuchleconus, Cithna, Conotrochus, Cyclostoma, Dextrobranchia, Dicathais, Dicosmus, Diozoptyxis, Eogastropoda, Euthyneura, Globulitopa, Hecatastoma, Helicarionoidea, Helicites, Helicoidea, Helictes, Heterostropha, Holyneconcha, Hyalaea, Hypsogastropoda, Isaea, Iteria, Liris, Lovonemetrida, Luoguella, Luoguispira, Mahajangina, Microcochlis, Mitrularia, Neptuneidae, Neritaemorpha, Neritimorpha, Notodelphinula, Opisthobranchia, Opisthonematidae, Orthogastropoda, Oxychilus, Palaeoniso, Pectinibranchia, Peraubium, Phorus, Pileopsis, Planorboidea, Platyostomella, Plicatusidae, Polygyridae, Pragoserpulinidae, Prosobranchia, Pulmonata, Rhytidopilidae, Rotellina, Sorbeoconcha, Spiraxidae, Spirgvaleia, Streptoneura, Suprazonalia, Taeniodomus, Thatcheriidae, Tortifusus, Toxonema, Trepsipleura, Tripartella, Trochiletes, Trochotremaria, Zeminolia, Zlichovia
Subtaxa: none
Ecology: epifaunal