Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
   Cephalaspidea Fischer, 1883 see Order Cephalaspidea Fischer, 1883
     1 Retusoidea Thiele, 1926 see Superfamily Philinoidea Gray, 1850 (1815)
     2 Runcinoidea Adams & Adams, 1854