Gastropoda - Heterostropha

Parent taxon: Heterobranchia according to P. Bouchet et al. 2017

See also Martin 1904, Sohl 1964, Squires 1984, Squires 1987 and Ward and Blackwelder 1987

Sister taxa: Allogastropoda, Anomalorbis, Palaeoalvania, Stuoraxidae, Architectonicoidea, Acteonoidea, Misurinella, Valvatoidea, Architectibranchia, Nerineoidea, Streptacidoidea

Subtaxa: Acteonimorpha Pyramidelloida Ringipleura Tectipleura

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