Order Ostreida Fërussac 1822 (oyster)
Alternative spelling: Ostreoida
Parent taxon: Pteriomorphia according to R. Bieler et al. 2014
See also Bouchet et al. 2010, Carter et al. 2011, Coan et al. 2000, Giribet and Wheeler 2002, Scholz et al. 2008, Squires 1999, Todd 2001 and Waller 2011
Sister taxa: Arcida, Limida, Mytilida, Mytilomorphi, Ostreomorphi, Pectinida, Prionodonta, Pterioida, Yunannioidea
Subtaxa: Malleidina Myodakryotidae Ostreidina Ostreoidea Palaeolophidae Pectinina Pinnoidea Placunopsidae Pterioidea