†family Parallelodontidae Dall 1898 (clam)
Parent taxon: Arcoidea according to J. G. Carter et al. 2011
Sister taxa: Arcidae, Catamarcaiidae, Cucullaeidae, Frejidae, Glycymerididae, Noetiidae
Subtaxa: Alytodonta, Cucullaria, Grammatodontinae, Parallelodontinae, Pichleria, Pleurogrammatodon
Ecology: facultatively mobile low-level epifaunal suspension feeder