Parent taxon: Bivalvia according to J. J. Sepkoski 2002
Sister taxa: Acturellina, Anthraconauta, Autolamellibranchiata, Aviculomya, Barcoona, Beichuania, Blairella, Bleta, Burriera, Camnantia, Carnidia, Claughtonia, Cruciella, Cryptodonta, Edon, Elasmatium, Elliptoidea, Ensia, Eubivalvia, Euburnopecten, Euprotobranchia, Geinitzia, Gibboconcha, Gosselettia, Guebhardia, Hemisterias, Hippagus, Isofilibranchia, Joannisiella, Laubeia, Libyaconchus, Lux, Manankovia, Megagrypha, Megalomus, Neotaxodonta, Onkogrypha, Ostreavicula, Palaearca, Palaeotaxodonta, Palanatina, Paradoxia, Phyllonia, Pleureterites, Praecardiomya, Praevicula, Productea, Protobranchia, Psammacola, Psammoconcha, Quadratia, Rebusum, Rhenanomya, Somalidacna, Taeniodon, Tatella, Telistrophis, Trachidomia, Tulongella, Velata, Hemicardium, Praeanomalodontata, Anomalodesmacea, Solenomyidae, Prionodesmacea, Teleodesmacea
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder