Skip to Main Content

Anadara initiator

Geological Range

Early Miocene; Extinct.

Paleogeographic Distribution

Northern Florida.

Remarks

Original Description (from Dall, 1898, p. 634):

"Oligocene of the Chipola beds, Chipola River, Florida; Burns.

Shell small, solid, oblique, with prosogyrate beaks, somewhat impressed mesially near the apices of the valves; right valve ovate-rhombic with twenty strong, rounded, nodulous, radial ribs, separated by wider interspaces; left valve decidedly smaller, with the ribs smooth, squarish, and without nodules, except a few on some of the shorter anterior ribs; cardinal area wider in front of the beaks, narrower behind them; margins of the valves internally fluted; hinge-line short, with about twenty-two subequal vertical teeth. Lon. (of left valve) 5, alt. 4.7, diam. 5 mm.

This little shell was at first thought to be the young of a larger species, but nothing allied to it of a larger size has turned up at any locality in the formation, while its solidity gives it a mature appearance. The cardinal area differs in form from any of the known species in the adult state."

To access this description in its original formatting through the Biodiversity Heritage Library, click here.

Stratigraphic Occurrences

Early Miocene
Chipola Formation (N. FL)
<i>Anadara initiator</i> from the Early Miocene Chipola Fm. of Calhoun County, Florida (UF 114181).
Anadara initiator from the Early Miocene Chipola Fm. of Calhoun County, Florida (UF 114181).
Specimen of <i>Anadara initiator</i> figured by Dall (1898, pl. 32, fig. 11); 5.5 mm in length.
Specimen of Anadara initiator figured by Dall (1898, pl. 32, fig. 11); 5.5 mm in length.
Early Miocene Map
Early Miocene Map<