Pectinacea The Pectinoidea are a superfamily of marine bivalve molluscs, including the scallops and spiny oysters.

[1] All members of this superfamily have a triangular resilium with a nonmineralized medial core that functions below the hinge line.

[2] According to the World Register of Marine Species, the Pectinoidea include these families (all taxa marked † are extinct):

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