Laevicardium crassum

Laevicardium crassum, the Norwegian egg cockle, is a species of saltwater clam, a cockle, a marine bivalve mollusc in the family Cardiidae, the cockles.

Fossil record
Fossils of Laevicardium crassum are found in marine strata of the Quaternary (age range: from 0.126 to 0.012 million years ago.). Fossils are known from various localities in Ireland, Italy, Netherlands and Portugal.

Description
Shell of Laevicardium crassum can reach a length of about 7.5 cm. The shell exterior is white or light yellow with occasional dark markings. The shell surface is smooth and shows 40-50 ribs with a crenulated margin.

Right and left valve of the same specimen:

Distribution
This species is present in Northeast Atlantic and the Mediterranean, at depths of 9 to 200 m.