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Anadara idonea

Geological Range

Early Miocene to Late Pliocene; Extinct.

Paleogeographic Distribution

Southern Florida to Maryland.

Remarks

Note that occurrence of species in St. Marys Fm. of Virginia is mapped as "Middle Miocene"; the actual age of the formation, however, cannot be resolved beyond simply "Miocene."

Original Description (from Conrad, 1832, p. 16):

"Cordate, inequivalve, ventricose, and slightly sinuous; ribs about 25, narrow and crenulated; the crenulations most distinct on the larger valve; beaks very prominant and distant; area with undulated grooves; hinge with the series of teeth contracted in the centre, and a little decurved at the ends.

Locality. St. Mary's River, Md. Upper Tertiary."

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Stratigraphic Occurrences

Late Pliocene
Jackson Bluff Formation (N. FL)
Tamiami Formation (Pinecrest Beds) (S. FL)
Late Miocene
Eastover Formation (VA)
Middle Miocene
St. Marys Formation (VA, MD) (Age not resolved beyond "Miocene")
Early Miocene
Calvert Formation (Plum Point Member) (MD)
Chattahoochee Formation (N. FL)
<i>Anadara idonea</i> from the Late Pliocene Jackson Bluff Fm. of Leon County, Florida (UF 4028).
Anadara idonea from the Late Pliocene Jackson Bluff Fm. of Leon County, Florida (UF 4028).
<i>Anadara idonea harveyensis</i> from the Late Pliocene Jackson Bluff Fm. of Leon County, Florida (UF 7458).
Anadara idonea harveyensis from the Late Pliocene Jackson Bluff Fm. of Leon County, Florida (UF 7458).
Specimen of <i>Anadara idonea</i> figured by Conrad (1832, pl. 1, fig. 5).
Specimen of Anadara idonea figured by Conrad (1832, pl. 1, fig. 5).
Late Pliocene Map
Late Pliocene Map
Late Miocene Map
Late Miocene Map
Middle Miocene Map
Middle Miocene Map
Early Miocene Map
Early Miocene Map<