Species Account

Aequipecten opercularis (Linnaeus, 1758)

Pectinoidea : Pectinidae

Tebble name: Chlamys (Aequipecten) opercularis (Linnaeus)
Smith & Heppell name: Aequipecten opercularis (L., 1758)

To size: To 90mm. Shell Structure: Solid. Equivalve: Inequivalve, upper left valve more convex than lower right valve. Equilateral: Equilateral. Outline: Subcircular, ears almost equal, anterior slightly larger. Contour: Byssal notch small, ctenolium present.

Sculpture: Of 19-22 low rounded radial ribs, these weakly radially striated and with fine co-marginal lines and weak ridges. Margin: Crenulate. Colour: Highly variable, shades of red to brown, yellow and purple all with irregular patterns of streaks and blotches.

Distribution & Ecology

Adults free living on sandy to shelly bottoms. From the sublittoral and across the shelf. Widespread.

Distributed from northern Norway and Faroes to the Iberian Peninsula, Canaries and Azores and the Mediterranean.

Depth Range
Continental Shelf (to 200m)

Additional Information & Related Species


Listed are literature citing Aequipecten opercularis (Linnaeus, 1758). Reference containing the species Type Description is highlighted.

Dijkstra H, Warén A & Gudmunsson G 2009. Pectinoidea (Mollusca: Bivalvia) from Iceland. Marine Biology Research. 5: 207-243.
Dijkstra H.H. 1999. Type specimens of the Pectinidae (Mollusca: Bivalvia) described by Linnaeus (1758-1771). Zoological Journal of the Linnean Society. 125: 383-443.
Dijkstra HH & Gofas S 2004. Pectinoidea (Bivalvia: Propeamussidae and Pectinidae) from some northeastern Atlantic seamounts. Sarsia. 89 (1): 33-78.
Dijkstra HH & Goud J 2002. Pectinoidea (Bivalvia, Propeamussiidae & Pectinidae) collected during the Dutch CANCAP and MAURITANIA expeditions in the south-eastern region of the North Atlantic Ocean. Basteria. 66: 31-82.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.


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Record last modified: 17/05/2016