Ostreida

Ostreida
A true oyster, family Ostreidae, the Pacific oyster, Magallana gigas
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Subclass:	Pteriomorphia
Order:	Ostreida Fërussac, 1822
Families
Gryphaeidae Ostreidae
Synonyms
Ostreoida

The order Ostreida includes the true oysters. One superfamily (Ostreoidea) and two extant families are recognised within it. The two families are Ostreidae, the true oysters, and Gryphaeidae, the foam oysters.

Taxonomy

The following is the phylogenetic tree based on complete mitochondrial genomes per Liu et al. (2019) ^[1] :

	Ostreida Pteriida Mytilida Arcida
	Pectinida

In 2010, a new proposed classification system for the Bivalvia was published by Bieler, Carter & Coan, revising the classification of the Bivalvia, including the order Ostreida. ^[2]

References

1. Galil, Bella; Mendelsohn, Moti (2025). "Too hot for comfort – shallow water populations of the spiny rock oyster Spondylus spinosus (Spondylidae) obliterated by unprecedented heatwaves in the SE Mediterranean Sea". Bollettino Malacologico. 61: 1–4. doi:10.53559/BollMalacol.2024.15.
2. Bieler, R., Carter, J.G. & Coan, E.V. (2010) Classification of Bivalve families. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), Nomenclator of Bivalve Families. Malacologia 52(2): 1-184

External links

• Data related to Ostreida at Wikispecies
• European checklist of marine species, for Molluscs
• Man and Molluscs Bivalve page