†Nakamuranaia Suzuki 1943 (clam)
Parent taxon: Unionoida according to I. Hayami 1975
Sister taxa: Actinodontophora, Actinodontophoroidea, Archanodontacea, Carydioidea, Cycloconchoidea, Etherioidea, Hyriidina, Pachycardia, Pachycardiidae, Protelliptio, Silesunionidina, Undulatula, Unionidina, Zhifangia
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder