Alternative spelling: Arcoida
Parent taxon: Arcioni according to J. G. Carter et al. 2011
See also Adegoke 1977, Anelli et al. 2006, Beu et al. 1990, Bieler and Mikkelsen 2006, Bouchet et al. 2010, Coan et al. 2000, Cope 1997, Giribet and Wheeler 2002, Gliozzi and Malatesta 1983, Hickman 2023, Mikkelsen and Bieler 2008, Nevesskaja 2009, Newell 1965, Rosenberg et al. 2006, Schnetler et al. 2024, Scholz et al. 2008, Sepkoski 2002, Spencer et al. 2004, Squires 1984, Squires 1987, Squires 1988, Squires 1999, Squires 1999, Squires 2010, Squires 2012, Stilwell et al. 2004, Todd 2001, Vokes 1980, Ward 1992 and Ward and Blackwelder 1987
Sister taxon: Cyrtodontida
Subtaxa: Antoneila Arcoidea Austracuculiaea Ekaterdonta Glycymeridoidea Glycymeroidea Glyptarcoidea Limopsoidea Okinawanoarca Pentoperna Philobryoidea Pitchleria
Ecology: facultatively mobile semi-infaunal suspension feeder