Order Allogastropoda Haszprunar 1985 (snail)
Parent taxon: Heterostropha according to D. Heidelberger 2001
Sister taxa: Anomalorbis, Palaeoalvania, Stuoraxidae, Nerineoidea, Misurinella, Euthyneura, Architectonicoidea, Streptacidoidea, Architectibranchia, Acteonoidea, Valvatoidea
Subtaxa: Ampezzanildidae Heterodiscohelix Levihelix Mathildoidea Xylodisculidae
Ecology: epifaunal