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. 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. Shell of Laevicardium crassum can reach a length of about 7.5 centimetres (3.0 in). 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. This species is present in Northeast Atlantic and the Mediterranean, at depths of 9 to 200 m.