Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
   Orthogastropoda Ponder & Lindberg, 1995 see Subclass Orthogastropoda Ponder & Lindberg, 1995
     Apogastropoda Salvini-Plawen & Haszprunar, 1987
       Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
         Euthyneura Spengel, 1881
           Pleurocoela see Clade Euopisthobranchia Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
             1 Anaspidea Fischer, 1883 see [unranked] Aplysiomorpha Pelseneer, 1906
             2 Cephalaspidea Fischer, 1883 see Order Cephalaspidea Fischer, 1883