Species Account

Scrobicularia plana (da Costa, 1778)

Tellinoidea : Semelidae

Tebble name: Scrobicularia plana (da Costa)
Smith & Heppell name: Scrobicularia plana (da Costa, 1778)

To size: To 65mm. Shell Structure: Solid, but thin shelled. Equivalve: Equivalve. Equilateral: Almost equilateral. Beaks in front of midline. Tumidity: Not tumid. Outline: Subovate. Posterior slightly angular.

Sculpture: Concentric lines and ridges. Margin: Smooth. Ligament: External and internal ligament. Internal large, opisthodetic, set in semicircular chondrophore beneath the external ligament. External ligament small, dark brown just behind beaks. Hinge: Two small cardinals in RV in front of ligament, one small cardinal in LV. No laterals. Pallial Musculature: Anterior adductor elongate, posterior tear-drop shaped. Pallial sinus large; flares upward to midline to a point that marks half the height of posterior scar and then reaches anteriorly and ventrally to become confluent with pallial line two-thirds of the way to the anterior margin. Cruciform muscle scars sometimes visible towards posterior ventral margin near the end of the pallial line. Periostracum: Thin, light brown. Colour: Cream/yellow/light brown.

Distribution & Ecology

Intertidal in estuaries and very sheltered bays, in mud on all coasts, rare or absent from northern Scotland, Orkney and Shetland. Clay or mud with abundant detritus.

Depth Range

Additional Information & Related Species


Listed are literature citing Scrobicularia plana (da Costa, 1778). Reference containing the species Type Description is highlighted.

da Costa E M 1778. Historia Naturalis Testaceorum Britanniae London: Millan, White, Elmsley & Robson. 254pp, 17pls.
Green J 1957. The growth of Scrobicularia plana (da Costa) in the Gwendraeth estuary. Journal of the Marine Biological Association of the United Kingdom. 36: 41-47.


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Record last modified: 17/05/2016