Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Suborder Neotaenioglossa Haller, 1882 see Order Sorbeoconcha Ponder & Lindberg, 1997
           Superfamily Vanikoroidea Gray, 1840
             Family Fossaridae Adams, 1860 see Subfamily Fossarinae Adams, 1860
               Genus Fossarus Philippi, 1841
                 Subgenus Halotapada Iredale, 1936