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Chesapecten septenarius

Geological Range

Early Pliocene to Late Pliocene; Extinct.

Paleogeographic Distribution

Southern Florida to North Carolina.


Original Description (from Say, 1824, p. 136):

"Shell convex, suborbicular: auricles subequal: surface with numerous slightly scaly striae, and about seven remote ribs, of which the three intermediate ones are much elevated, rounded, or slightly flattened on the top.

Length nearly two inches and seven-tenths.

But a single imperfect, inferior valve, occurs in Mr. Finch's collection; but this is so perfectly distinct from any other that I have seen described, that I have no hesitation to describe it as new. The striae are equally distinct on the ribs, and in the intermediate spaces. The scales are rather thick, very small, and not confined to the striae, but are also observable in the spaces between the striae."

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Stratigraphic Occurrences

Late Pliocene
Duplin / Raysor formations (GA)
Raysor Formation (GA, SC)
Tamiami Formation (Lower) (S. FL)
Yorktown Formation (NC)
Early Pliocene
Goose Creek Limestone (GA, SC)
<i>Chesapecten septenarius</i> from the Late Pliocene Tamiami Fm. (Lower) of Sarasota County, Florida (UF 49975).
Chesapecten septenarius from the Late Pliocene Tamiami Fm. (Lower) of Sarasota County, Florida (UF 49975).
Late Pliocene Map
Late Pliocene Map
Early Pliocene Map
Early Pliocene Map