Southern ribbed mussel

Geukensia granosissima
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Subclass:	Heterodonta
Order:	Mytiloida
Family:	Mytilidae
Subfamily:	Mytilinae
Genus:	Geukensia
Species:	G. granosissima
Binomial name
Geukensia granosissima (G.B. Sowerby III, 1914)

Geukensia granosissima, common name the southern ribbed mussel, is a species of saltwater mussel, a marine bivalve mollusk in the family Mytilidae, the mussels.

This species is native to the Atlantic coast of North America. Southern ribbed mussels are found in the Florida Keys, the Caribbean and the Gulf of Mexico. On the Atlantic coast to the north, the closely related ribbed mussel Geukensia demissa is found.

The ribbed shells of this species attain a length of 10 cm.

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Wikipedia