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Astralium dalli

Geological Range

Early Miocene; Extinct.

Paleogeographic Distribution

Northern Florida.

Remarks

Original Description (from Maury, 1910, p. 31-32):

"Shell small, depressed, trochiform, four-whorled, with eight slender spines at the periphery; surface of the whorls coarsely wrinkled just beneath the spines and finely wrinkled just above the spines. Between these wrinkled bands are four faint spirals generally seen only with a lens. Base rather flat with four or five raised threads, either smooth or slightly beaded.

Height of shell 3.5; greatest width 5 mm.

Specimens of this species were described in 1892, but not named by Dr. Dall to whom the shell is now dedicated.

Chipola marls, Bailey's Ferry, Florida.

Cornell University collection."

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Stratigraphic Occurrences

Early Miocene
Chipola Formation (N. FL)
<i>Astralium dalli</i> from the Early Miocene Chipola Fm. of Calhoun County, Florida (UF 94364).
Astralium dalli from the Early Miocene Chipola Fm. of Calhoun County, Florida (UF 94364).
Specimen of <i>Astralium dalli</i> figured by Maury (1910, pl. 8, fig. 3); 3.5 mm in length.
Specimen of Astralium dalli figured by Maury (1910, pl. 8, fig. 3); 3.5 mm in length.
Early Miocene Map
Early Miocene Map<