Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Subphylum Conchifera Gegenbauer, 1878
             Order Cephalaspidea Fischer, 1883
               Suborder Bulloidei
                 Superfamily Bulloidea Gray, 1827
                   2 Family Atyidae Thiele, 1925, orth. rej. see Family Atydidae Thiele, 1925
                   3 Family Runcinidae Adams & Adams, 1854
                   4 Family Philinoglossidae Hertling, 1932
                   5 Family Retusidae Thiele, 1925