Order Ostreida Fërussac 1822 (oyster)
Alternative spelling: Ostreoida
Parent taxon: Ostreiformii according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Coan et al. 2000, Giribet and Wheeler 2002, Scholz et al. 2008, Squires 1999, Todd 2001 and Waller 2011
Sister taxon: Pectinida
Subtaxa: Malleidina Myodakryotidae Ostreidina Palaeolophidae Pectinina