Pteriomorphia
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| Pteriomorphia | ||||||||
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Arcoida |
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 mollusc 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.
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