[Heterobranchia] Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
   Euthyneura Spengel, 1881
     Euopisthobranchia Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
       Runcinacea Colosi, 1915 see Order Runcinacea Colosi, 1915