Parent taxon: Gastropoda according to M. C. McKenna et al. 1962
Sister taxa: Acteonoidea, Admetidae, Alamirifica, Alectrionidae, Amphigastropoda, Archaeobranchia, Auroraella, Beekmanoceras, Bellerophontida, Bicuerda, Brachycerithium, Briardia, Bucardites, Buccinites, Bulimella, Bulimulidae, Bulimus, Capulus sellardsi, Cavolinioidea, Chartrionella, Chippewaella, Chlathrus, Chrysodomidae, Chuchleconus, Cithna, Cocculiniformia, Cyclostoma, Dextrobranchia, Dicathais, Dicosmus, Doliidae, Elmira, Eogastropoda, Euthyneura, Fruiticicoiidae, Gadinidae, Galeodea schencki, Galericulus, Globulitopa, Gordenella, Gryphellina, Hecatastoma, Helicarionoidea, Helicites, Helictes, Helminthoglyptidae, Holyneconcha, Hyalaea, Hypsogastropoda, Hyrcania, Isaea, Iteria, Juliidae, Liris, Lovonemetrida, Luoguella, Luoguispira, Lysechinus, Lysechinus incongruens, Mahajangina, Mathildidae, Microcochlis, Mitrularia, Neptuneidae, Neritaemorpha, Neritimorpha, Neritites, Notodelphinula, Opisthobranchia, Opisthonematidae, Orthogastropoda, Oxychilus, Pectinibranchia, Peraubium, Phorus, Pitonnellus, Platyostomella, Platystoma, Plectopyloidea, Plicatusidae, Polygyridae, Pragoserpulinidae, Prasinidae, Prosobranchia, Pseudobrochidium, Pseudotylostoma, Ptenoglossa, Pteronotus, Pteropoda, Pulmonata, Pupillacea, Pythia, Rhytidopilidae, Rotellina, Scalariidae, Serpulopsis, Siphonaliidae, Sorbeoconcha, Spiraxidae, Spirgvaleia, Stramonita petrosa, Streptoneura, Stuorilda, Suprazonalia, Taeniodomus, Thatcheriidae, Tirolthilda, Tornatella, Tortifusus, Toxonema, Tripartella, Trochiletes, Trochonematoidea, Trochopsis, Trochotremaria, Trochulus, Zeminolia, Zlichovia
Subtaxa: Holospira
Ecology: epifaunal
Distribution: