[Heterobranchia] Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
   Euthyneura Spengel, 1881
     Euopisthobranchia Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
       1 Umbraculoidea Dall, 1889 (1827)
       2.1.1 Runcinacea Colosi, 1915 see Order Runcinacea Colosi, 1915
       2.1.2.1 Anaspidea Fischer, 1883 see [unranked] Aplysiomorpha Pelseneer, 1906
       2.1.2.2 Pteropoda Cuvier, 1804 see Order Pteropoda Cuvier, 1804
       2.2 Cephalaspidea s.s. Fischer, 1883 see Order Cephalaspidea Fischer, 1883