Panomya arctica

(Spengler, 1793)

A large thick shell shaped like Mya truncata but with a broad furrow in the middle of each valve. One very small tooth in the right valve and two teeth in the left (P. arctica-drawing).

Up to 50 x 75 mm. Some shells may reach the length of 125 mm.

The shell is covered by a yellow-brown periostracum.

The siphons are protected by a thick leathery sheath, and the lower tube is larger than the upper one.

Deeply buried in muddy or sandy ground from intertidal zone down to 300 m.

A very rare, circumpolar species. In Europe from the Lofoten Islands, Iceland south to the British Isles. Reported also from the Mediterranean. (Distr. P. arctica).