†family Ambonychiidae Miller 1877 (clam)
Parent taxon: Ambonychioidea according to J. G. Carter et al. 2011
Sister taxa: Lunulacardiidae, Monopteriidae, Myalinidae, Mysidiellidae, Ramonalinidae
Subtaxa: Allonychia, Ambonychia, Ambonychinia, Ambonychiopsis, Amphicoelia, Amphiocoelia, Anomalocoelia, Anomalodonta, Byssopteria, Cleionychia, Congeriomorpha, Elasmodophora, Glyptonychia, Gosseletia, Leconychia, Lophonychia, Maryonychia, Mytilarca, Notonychia, Opisthoptera, Paramytilarca, Praeanomalodonta, Psilonychia, Pteronychia, Silurinka
Ecology: stationary epifaunal suspension feeder