Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
   1 Cephalaspidea Fischer, 1883 see Order Cephalaspidea Fischer, 1883
   2 Anaspidea Fischer, 1883 see [unranked] Aplysiomorpha Pelseneer, 1906
   3 Sacoglossa Ihering, 1876 see Order Sacoglossa Ihering, 1876
   4 Nudipleura Wägele & Willan, 2000