Superfamily Carydioidea Haffer 1959 (clam)
Parent taxon: Unionoida according to L. A. Nevesskaja 2009
Sister taxa: Actinodontophora, Actinodontophoroidea, Archanodontacea, Cycloconchoidea, Etherioidea, Hyriidina, Nakamuranaia, Pachycardia, Pachycardiidae, Protelliptio, Silesunionidina, Undulatula, Unionidina, Zhifangia
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder