Superorder Nuculiformii Dall 1889 (clam)
Parent taxon: Protobranchia according to J. G. Carter et al. 2011
See also Parkhaev 2001
Sister taxa: Antactinodiontidae, Nuculaniformii, Sareptoidea, Solemyoida, Zeehania
Subtaxa: Nuculida Nuculiformes Solemyida
Ecology: facultatively mobile infaunal suspension feeder