A class of bilaterally symmetrical mollusks, which are laterally flattened and have a shell made of two hinged valves.
The following taxa of this class occur in the region:
Spondylus americanus (Atlantic thorny-oyster)
Lima scabra (Rough fileclam)
Lima lima (Spiny fileclam)
Pinctada radiata (Atlantic pearl-oyster)
Pteria colymbus (Atlantic wing-oyster)
Isognomon alatus (Flat tree-oyster)
Isognomon radiatus (Lister purse-oyster)
Pinna carnea (Amber penshell)
Tellina radiata (Sunrise tellin)