Scientific Classification
| Kingdom: Animalia |
| Phylum: Mollusca |
| Class: Gastropoda |
| Order: Trochida |
| Family: Turbinidae |
| Genus: Lithopoma |
| Species: Lithopoma precursor (Dall, 1892) |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
| Bermont Formation [Questionable/rare] |
| Caloosahatchee Formation [Common] |
| Tamiami Formation (Pinecrest Beds) [Uncommon] |
Remarks
Common name: n/a
Synonymy: n/a
Type specimen, locality, and stratum: n/a
Other voucher specimens: n/a
Descriptions:
Original Description (from Dall, 1892, p. 384-385):
“Pliocene marls of the Caloosahatchie and Shell Creek, Florida.
Shell elevated, subacute, eight-whorled; nucleus small, smooth, of a single whorl; subsequent whorls sculptured with numerous subequal, flexuous, spiral threads, with narrower interspaces, crossed obliquely by numerous elevated, imbricated incremental lamellae, so close-set that the entire surface when intact is densely scaly with minute flexuous, irregular scales; at right angles to the incremental lines the surface of the whorl is plicated from the suture forward with low irregular ridges, which frequently fail before reaching the periphery, and vary in number as well as in strength, generally being more numerous than the peripheral nodules; periphery rounded, pinched up into numerous (12 to 18) squarish nodules, with their vertical axes the longer, over which the smaller sculpture is continuous, and above which the whorl is somewhat contracted; base flattish, with four to six principal spirals and a narrow, elevated fasciole around the pillar, the whole covered densely with imbricated lamellae like those of the spire; pillar arched, narrow, with a groove behind it, and bituberculate at the base; aperture rounded quadrate, simple inside, the outer margin somewhat crenulated by the sculpture; the periphery of the whorls overhangs the suture, and its nodules are rarely spinose except near the apex. Alt. of shell 35; max. diam. 28 mm.
Operculum with the inner side flat and exhibiting four or five whorls with an impressed line parallel with the suture; the outer side convex, with a deep pit over the nucleus and the remainder of the surface showing six or seven strong spiral, granular ribs separated by narrower, deeply-cut grooves, terminating at the surface of increment.”
To access this description in its original formatting through Google Books, click here.
Measurements: n/a
Other remarks: n/a
References: n/a
Online resources: n/a
Page history:
Some of the content on this page was originally published on the Neogene Atlas of Ancient Life on February 6, 2015. It was developed by Jonathan R. Hendricks and colleagues and migrated here in 2026.
This page was last modified on October 28, 2026 by Jonathan R. Hendricks.
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