Noetia ponderosa, (Say, 1822)
Noetia ponderosa, or the ponderous ark clam, is a marine clam in the family Noetiidae.
The shape of the shell is rounded trigonal, almost as high as long,
with 27-31 squared radial ribs divided by fine incised lines,
and a distinctive brown or black periostracum. The exterior and interior of the shell is a white color. Size approximately 50–60 mm.
Atlantic coast of North America, ranging from Virginia to Florida,
West Indies, Gulf of Mexico, and Caribbean Central America.
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