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Tenby, Pembrokshire, Wales, UK, NE Atlantic

Tenby, Pembrokshire, Wales, UK, NE Atlantic

Sound of Mull, off Java Point, Scotland : 56° 28.6’N / 5° 40.2’W : 20m


Mya truncata Linnaeus, 1758
NMW Image No.

Mya truncata Linnaeus, 1758

Myoidea : Myidae
Tebble name: Mya truncata Linnaeus
Smith & Heppell name: Mya truncata L.,1758

To size: To 80mm. Shell Structure: Solid. Equivalve: Inequivalve, RV slightly more convex than LV. Equilateral: Subequilateral beaks just behind the midline. Outline: Oblong, elongate; anterior broadly rounded, ventral rather straight; posterior ventral and posterior dorsal margins short, posterior truncate gaping widely.

Sculpture: Of co-marginal lines and low ridges with occasional faint radial lines. Margin: Inner margin smooth. Ligament: Primarily internal on a large spoon shaped projecting chondrophore in LV and corresponding concealed resilifer beneath the umbo in RV. Small external part, concealed and attached to posterior part of chondrophore. Hinge: Hinge without teeth. Pallial Musculature: Pallial sinus deep extending to beneath the beaks, lower arm irregularly confluent with pallial line. Periostracum: Persistent, straw coloured to dark brown. Colour: Shell white.

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Distribution & Ecology

A deep burrower in sand and sandy mud. From low in the intertidal to shallow shelf depths of about 70m. Widespread.

Depth Range
Continental Shelf (to 200m)

Juveniles & Similar Species

Juvenile Description
The juveniles lack the truncate posterior and closely resemble M. arenaria.

Key Features & Similar Species

Additional Comments

Myoidea : Myidae


Listed are literature citing Mya truncata Linnaeus, 1758. Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.




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Record last modified - 22/03/2016