Pteriomorphia

Taxobox
name = Pteriomorphia

---

regnum = Animalia
phylum = Mollusca
classis = Bivalvia
subclassis = Pteriomorphia
subclassis_authority =
subdivision_ranks = Orders
subdivision = See text.

Pteriomorphia is a mollusc subclass of the Bivalvia. Apart from the orders Arcoida, Mytiloida, Ostreoida, and Pterioida, it also contains some extinct and probably basal families, such as the Evyanidae, Colpomyidae, Bakevelliidae, Cassianellidae and Lithiotidae.

Pteriomorpha molluscs have lamellibranch gills and are epibenthic. Some can attach to substrate using a byssus. One foot is reduced the mantle margins are not fused. Gills are usually large and assist in feeding. This group includes the well known mussels, scallops, pen clams, and oysters.

Orders in the subclass Pteriomorphia

* Arcoida
* Cyrtodontoida†
* Limoida
* Mytiloida
* Ostreoida
* Praecardioida†
* Pterioida

References