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
Suborder Orthurethra Pilsbry, 1900
Superfamily Buliminoidea Kobelt, 1880, nom. illeg.
Family Buliminidae Kobelt, 1880, orth. rej.
see Family Buliminusidae Kobelt, 1880
Subfamily Bulimininae Kobelt, 1880, nom. illeg.
see Subfamily Buliminusinae Kobelt, 1880
Genus Pseudonapaeus Westerlund, 1887
Subgenus Cauliculus Lindholm, 1925