[Heterobranchia] Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
   Euthyneura Spengel, 1881
     Panpulmonata Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
       Hygrophila Férussac, 1822 see Order Hygrophila Férussac, 1822