†Amphicoelia Hall 1865 (clam)
Bivalvia - Myalinida - Ambonychiidae
Parent taxon: Ambonychiidae according to O. Isberg 1934
Sister taxa: Allonychia, Ambonychia, Ambonychinia, Ambonychiopsis, Amphiocoelia, Anomalocoelia, Anomalodonta, Byssopteria, Cleionychia, Congeriomorpha, Elasmodophora, Glyptonychia, Gosseletia, Leconychia, Lophonychia, Maryonychia, Mytilarca, Notonychia, Opisthoptera, Paramytilarca, Praeanomalodonta, Psilonychia, Pteronychia, Silurinka
Subtaxa: Amphicoelia costata, Amphicoelia leidyi, Amphicoelia pojetana, Amphicoelia transplicata, Amphicoelia ulrichi
Type: Amphicoelia leidyi
Ecology: stationary epifaunal suspension feeder