Acrosterigma magnum

Acrosterigma magnum, or the magnum cockle, is a species of bivalve mollusc in the family Cardiidae, the true cockles.

Description
Acrosterigma magnum has a shell reaching a length of 38 – 48 mm.

Distribution
This species is found in Caribbean waters, ranging from the Florida Keys to the Gulf of Mexico and northern Brazil.