Bivalvia - Ostreomorphi

Alternative spelling: Arcoida

Parent taxon: Arcioni according to J. G. Carter et al. 2011

Sister taxon: Cyrtodontida

Subtaxa: Aegilops, Antoneila, Arcoidea, Austracuculiaea, Cardiolita, Catamarcaia, Curvirostrum, Ekaterdonta, Eusebia, Falcatodonta, Glycymeridoidea, Glycymeroidea, Glyptarcoidea, Incanopsis, Limopsoidea, Macrodontella, Metapadia, Myodakryotus, Noetiella, Okinawanoarca, Pentoperna, Philobryoidea, Pitchleria, Sowteria, Spinearca, Stenzelia, Torinosulcatella, Vasconella, Verilarca, Vetoarca, Vigorniella

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Ecology: facultatively mobile semi-infaunal suspension feeder