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Anadara campyla

Geological Range

Late Pliocene to Early Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida to northern Florida.

Remarks

Original Description (from Dall, 1898, p. 644-645):

"Pliocene of the Caloosahatchie, Shell Creek, Alligator Creek, and Myakka River, Florida; Willcox and Dall.

Shell of moderate size, solid, rather rude, the posterior end strongly twisted to the right, the beaks low, and the form somewhat compressed; the umbones are very slightly bent forward, and are situated at about the anterior third; left valve with about thirty low, flat radial ribs, becoming wider and sparser posteriorly, crossed by rather rude incremental lines, but not nodulous or dichotomous, and with subequal, rather shallow channelled interspaces; the right valve is similarly sculptured and somewhat smaller; cardinal area rather long, narrow, with numerous slightly angular, longitudinal grooves; ends of the hinge-line moderately angular, anterior end of shell rounded, posterior produced, base flexuous, inner margins fluted; teeth numerous, small, uninterrupted, nearly vertical, the distal ones larger and tending to break up into granules. Lon. of a large valve 50, alt. 34 mm.; of figured specimen, Ion. 38, alt. 27, diam. 20 mm.

This species is one of the most abundant in the Floridian Pliocene, and is easily distinguished from any other by its compressed appearance and twisted shape. Some of the allied species have a slight flexuosity, but in none is this feature so pronounced as in A. campyla. A variety with thinner shell and narrower and slightly more elevated ribs was at first thought to be distinct, and may be named var. aeretea. It is figured plate 32, figure 22."

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Stratigraphic Occurrences

Late Pleistocene
Fort Thompson Formation (S. FL)
Early Pleistocene
Caloosahatchee Formation (S. FL)
Nashua Formation (N. FL)
Late Pliocene
Tamiami Formation (Pinecrest Beds) (S. FL)
<i>Anadara campyla</i> from the Early Pleistocene Caloosahatchee Fm. of Glades County, Florida (UF 210386).
Anadara campyla from the Early Pleistocene Caloosahatchee Fm. of Glades County, Florida (UF 210386).
Specimen of <i>Anadara campyla</i> figured by Dall (1898, pl. 31, fig. 3 and 4); 37 mm in length.
Specimen of Anadara campyla figured by Dall (1898, pl. 31, fig. 3 and 4); 37 mm in length.
Specimen of <i>Anadara campyla</i> var. <i>aeretea</i> figured by Dall (1898, pl. 32, fig. 22); 34 mm in length.
Specimen of Anadara campyla var. aeretea figured by Dall (1898, pl. 32, fig. 22); 34 mm in length.
Late Pleistocene Map
Late Pleistocene Map
Early Pleistocene Map
Early Pleistocene Map
Late Pliocene Map
Late Pliocene Map