Amygdalum papyrium

Amygdalum papyrium, common name the Atlantic paper mussel, is a species of marine bivalve mollusc in the family Mytilidae, the true mussels. This species occurs along the Atlantic coast of North America, from Maryland to Florida, as well as in the Gulf of Mexico, from Texas to Mexico. The Atlantic paper mussel has a pair of fragile, elongated, ova...
Found on http://en.wikipedia.org/wiki/Amygdalum_papyrium
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