Species Account

Thracia villosiuscula (Macgillivray, 1827)

Thracioidea : Thraciidae

Tebble name: Thracia villosiuscula (Macgillivray)
Smith & Heppell name: Thracia villosiuscula (Macgillivray, 1827)

To size: To 30mm. Shell Structure: Brittle. Equivalve: Inequivalve, RV more convex than LV. Equilateral: Inequilateral, beaks behind midline. Outline: Oval; anterior margin broadly rounded, posterior dorsal margin straight, becoming truncated. Ventral margin almost straight, curves slightly in some specimens.

Sculpture: Concentric lines and ridges covered with coarse granulations which are more visible on the posterior and can be seen at low magnification. Margin: Smooth. Ligament: External and internal: External short, behind beaks; internal thick in a narrow triangular resilifer below external. Hinge: Lithodesma short, narrow, in front of ligament. Pallial Musculature: Broadly rounded to below anterior end of resilifer. Not confluent. Periostracum: Light brown, very thin. Colour: White.

Distribution & Ecology

Widely distributed across the UK from low in the intertidal zone to mid-shelf. Found in coarse sand and fine and coarse gravel.

Depth Range
Continental Shelf (to 200m)

Additional Information & Related Species


Listed are literature citing Thracia villosiuscula (Macgillivray, 1827). Reference containing the species Type Description is highlighted.

Macgillivray W 1827. Description of Anatina villosiuscula, a new species, and of Venerupis nucleus, a species new to the British fauna. Edinburgh New Philosophical Journal. 2: 370-371.


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Record last modified: 22/03/2016