Superorder Hygrophila Ferussac 1822
Parent taxon: Panpulmonata according to P. Bouchet et al. 2017
See also Bouchet et al. 2005 and Lakhanpal et al. 1976
Sister taxa: Acochlidimorpha, Eupulmonata, Pylopulmonata, Sacoglossa, Siphonarimorpha
Subtaxa: Acroloxoidea Chilinoidea Lymnaeoidea Planorboidea