Late Pliocene to Middle Pleistocene; Extinct.
Southern Florida to northern Florida.
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)."
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