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Xenophora floridana

Geological Range

Late Pliocene to Middle Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida to northern Florida.

Remarks

Original Description (from Mansfield, 1930, p. 121-122):

"The new subspecies is more closely related to Xenophora delecta (Guppy) than to Xenophora conchyliophora (Born). It differs from X. delecta (Guppy) in having a proportionately higher shell and a less granulose ornamentation on the base. The shell is more profusely loaded with shells and other objects than X. delecta and reveals far less protractive undulating or wrinkled lines. The new subspecies differs from X. conchyliophora in having a larger umbilicus and stronger, more persistent concentric weakly beaded spiral on the base.

The new subspecies attains a rather large size. The largest and most nearly perfect shell is about 40 mm. high and 50 mm. in diameter. The umbilicus is rather large and is partly concealed by the expanded margin of the inner lip.

Type (U. S. N. M. Cat. No. 370438) measures: Altitude, 30 mm.; greatest diameter, 38 mm.

Occurrence: Harveys Creek, half a mile above abandoned mill, Leon County, Fla. (common), type locality (collections by T. W. Vaughan, the Florida Geological Survey, and W. C. Mansfield); borrow pit, near Jackson Bluff, Leon County (1 immature specimen, collected by the Florida Geological Survey)."

To access this description in its original formatting through Google Books, click here.

Stratigraphic Occurrences

Middle Pleistocene
Bermont Formation (S. FL)
Early Pleistocene
Caloosahatchee Formation (S. FL)
Late Pliocene
Jackson Bluff Formation (N. FL)
Tamiami Formation (S. FL)
Tamiami Formation (Pinecrest Beds) (S. FL)
<i>Xenophora floridana</i> from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Highlands County, Florida (UF 135581).
Xenophora floridana from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Highlands County, Florida (UF 135581).
Specimen of <i>Xenophora floridana</i> figured by Mansfield (1930, pl. 18, fig. 5 and 6); 30 mm.
Specimen of Xenophora floridana figured by Mansfield (1930, pl. 18, fig. 5 and 6); 30 mm.
Middle Pleistocene Map
Middle Pleistocene Map
Early Pleistocene Map
Early Pleistocene Map
Late Pliocene Map
Late Pliocene Map