Species Account

Mysia undata (Pennant, 1777)

Veneroidea : Petricolidae

Tebble name: Mysia undata (Pennant)
Smith & Heppell name: Mysia undata (Pennant, 1777)

To size: To 38mm. Shell Structure: Thin, fragile shell. Equivalve: Equivalve. Equilateral: Almost equilateral. Beaks just in front of midline. Tumidity: Not tumid. Outline: Sub-circular. Poorly-defined lunule. Escutcheon absent.

Sculpture: Concentric grooves, growth lines visible. Margin: Smooth. Ligament: Inset, but highly visible, chesnut brown in colour. Runs almost to the end of the dorsal margin. Hinge: 3 cardinals in LV, 2 in RV. Central cardinal in LV bifid, posterior in RV bifid. Pallial Musculature: Huge pallial sinus pointing towards space between the beak and the anterior adductor scar. Periostracum: Thin, satin. Colour: White/pale yellow.

Distribution & Ecology

Widely but locally distributed on all coasts from the shallow sublittoral to the outer shelf. Lives mostly in fine silty sand and coarser substrates but always with a silty component. Burrows in muddy sand, gravel and muddy shell-gravel.

Depth Range
Continental Shelf (to 200m)

Additional Information & Related Species

Related Species

Veneroidea : Petricolidae


Listed are literature citing Mysia undata (Pennant, 1777). Reference containing the species Type Description is highlighted.

Pennant T 1777. British Zoology vol.IV. Crustacea, Mollusca, Testacea London, B. White. 154pp, 93pls.


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Record last modified: 17/05/2016