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 Genus Indrella Godwin-Austen, 1901