(Scale bar is 1 cm)One of the most distinctive scallop shells in the fossil record of the southeastern United States is that of Amusium ocalanum. The smooth, unribbed surface of the shell makes it very easy to recognize.
The species is known only from the middle part of the Ocala Limestone, making it a very useful fossil for correlation.
Other than indicating a clear-water marine environment, this species is not particularly useful for interpreting ancient environments. Like all scallops it lived above the sediment, probably moving about by flapping its valves and squirting water from between them. As a result, it was not particularly picky about what sort of bottom sediment lay underneath it.
AGE: LATE EOCENE
FORMATION: OCALA LIMESTONE
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