Glycymeris nummaria is a species of saltwater clam, a marine bivalve mollusc in the family Glycymerididae, the bittersweet clams.
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, 1819
Description
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<div align=center> Glycymeris nummaria var. insubrica Right and left valve of the same specimen:
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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-Balić - Growth And Longevity of Glycymeris nummaria (Linnaeus, 1758) from the Eastern Adriatic, Croatia
External 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. .