Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Divasibranchia Minichev & Starobogatov, 1975
Order Stylommatophora Schmidt, 1855
see Infraorder Stylommatophora Schmidt, 1855
(Helicid Sigmurethra)
Superfamily Helixarionoidea Bourguignat, 1883, orth. inval.
Family Ariophantidae Godwin-Austen, 1888
Subfamily Macrochlamydinae Godwin-Austen, 1888
Genus Megaustenia Cockerell, 1912