Synonyms
* ''Arca insubrica'' Brocchi, 1814 * ''Arca nummaria'' Linnaeus, 1758 * ''Glycymeris insubrica'' (Brocchi, 1814) * ''Glycymeris violacescens'' (Lamarck, 1819) * ''Pectunculus cor'' Lamarck, 1805 * ''Pectunculus nudicardo'' Lamarck, 1819 * ''Pectunculus obliquatus'' Rayneval & Ponzi, 1854 * ''Pectunculus pilosellus'' Risso, 1826 * ''Pectunculus purpurascens'' M' Andrew, 1854 * ''Pectunculus reticulatus'' Risso, 1826 * ''Pectunculus transversus'' Lamarck, 1819 * ''Pectunculus zonalis'' Lamarck, 1819Description
The shell of an adult ''Glycymeris nummaria'' can be as large as . It is quite thick, almost circular in shape, with a sculpture of radiating striae and fine concentric lines. The surface is dull and may be dark or pale brown, but also whitish-yellowish. Inside of the shell is glossy, white or pale yellow, often with irregular brown markings.Distribution and habitat
This species is widespread from Norway to the Mediterranean Sea. It lives in sandy-muddy gravels offshore to depths of about .References
*Melita Peharda, Marija Crnčević, Ivana Bušelić, Chris A. Richardson and Daria Ezgeta-BalićExternal links
* Najdek M., Ezgeta-Balić D., Blažina M., Crnčević M. & Peharda M. (2016). "Potential food sources of ''Glycymeris nummaria'' (Mollusca: Bivalvia) during the annual cycleindicated by fatty acid analysis". '' Scientia Marina'' 80(1): 123-129. . nummaria Molluscs described in 1758 Taxa named by Carl Linnaeus {{bivalve-stub