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Eucrassatella speciosa

Geological Range

Late Pliocene to Late Pleistocene; Recent.

Paleogeographic Distribution

Southern Florida to North Carolina.

Remarks

For information on the modern distribution of the species, see Malacolog and WoRMS.

First English Description (from Tuomey and Holmes, 1856, p. 74):

"Description. Shell somewhat triangular, thick, concentrically furrowed; buccal side rounded; anal side somewhat beaked, angular, with a longitudinal ridge; umbones incurved; lunule somewhat excavated. This well-defined species is easily distinguished from any of the varieties of the preceding species. The umbones are much incurved and more inflated than in any form of C. undulata. It differs from the Virginia and Maryland species in its more symetrical form and greater regularity of the sulci, which mark the entire surface of the shell. The ridge on the anal side is prominent, and produces an undulation which extends to the centre of the shell.

The species is very constant in its characters in every stage of growth. Fig. 10 represents a young shell.

We have great pleasure in inscribing this species to our friend and co-laborer, Professor L. R. Gibbes, of the College of Charleston.

Plate XX. Fig. 9, Exterior of left valve.

" 10, Young shell.

Locality. Waccamaw.

Museum, College of Charleston.

The living species of Crassatella are inhabitants of warm climates. The genus is first found in the Cretaceous system, and has its greatest development in the Tertiary."

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

Stratigraphic Occurrences

Late Pleistocene
Coffee Mill Hammock Formation (S. FL)
Fort Thompson Formation (S. FL)
Middle Pleistocene
Bermont Formation (S. FL)
Bermont Formation? (S. FL)
Early Pleistocene
Bear Bluff Formation (SC)
Caloosahatchee Formation (S. FL)
Nashua Formation (N. FL)
Waccamaw Formation (SC, NC)
Late Pliocene
Duplin Formation (NC)
Duplin / Raysor formations (GA)
Jackson Bluff Formation (N. FL)
Raysor Formation (GA, SC)
Tamiami Formation (S. FL)
Tamiami Formation (Murdock Station Member) (S. FL)
Tamiami Formation (Lower) (S. FL)
Tamiami Formation (Pinecrest Beds) (S. FL)
<i>Eucrassatella speciosa</i> from the Early Pleistocene Caloosahatchee Fm. of Miami-Dade County, Florida (UF 168546).
Eucrassatella speciosa from the Early Pleistocene Caloosahatchee Fm. of Miami-Dade County, Florida (UF 168546).
Specimen of <i>Eucrassatella speciosa</i> figured by Tuomey and Holmes (1856, pl. 20, fig. 9 and 10).
Specimen of Eucrassatella speciosa figured by Tuomey and Holmes (1856, pl. 20, fig. 9 and 10).
<i>Eucrassatella speciosa</i> from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Sarasota County, Florida (PRI 70076).
Eucrassatella speciosa from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Sarasota County, Florida (PRI 70076).
Late Pleistocene Map
Late Pleistocene Map
Middle Pleistocene Map
Middle Pleistocene Map
Early Pleistocene Map
Early Pleistocene Map
Late Pliocene Map
Late Pliocene Map