Suborder Unionidina Gray 1854 (clam)
Parent taxon: Unionida according to J. G. Carter et al. 2011
Sister taxa: Actinodontophoroidea, Amblemidae, Archanodontacea, Archanodontoidea, Carydioidea, Etherioidea, Hyriidina, Protelliptio, Silesunionidina, Silesunionina, Tihkia
Subtaxa: Mullerioidea Unionoidea
Ecology: facultatively mobile infaunal suspension feeder