[Heterobranchia] Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
   Euthyneura Spengel, 1881
     Panpulmonata Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
       Acochlidia Odhner, 1937 see Order Acochlidia Odhner, 1937
         Microhedylacea see Suborder Microhedylacea Wawra, 1987, nom. ined.