[Mollusca] Linnaeus, 1758 - molluscs
   Gastropoda Cuvier, 1795 - snails and slugs
     Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Archaegastropoda see Order Archaeogastropoda Thiele, 1925
         Trochacea see Superfamily Trochoidea Rafinesque, 1815
           Trochidae Rafinesque, 1815 - top snails
             Margaritinae Thiele, 1924, nom. cons. prop.
               Euchelus Philippi, 1847
                 Euchelus (Herpetopoma) Pilsbry, 1889 see Genus Herpetopoma Pilsbry, 1890