Species Account

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.

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)

Additional Information & Related Species

Juvenile Description

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

Related Species


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