Scientific Classification
| Kingdom: Animalia |
| Phylum: Mollusca |
| Class: Gastropoda |
| Order: Littorinimorpha |
| Family: Naticidae |
| Genus: Sinum |
| Species: Sinum polandi Smith, 1936 |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
| Bermont Formation [Questionable/rare] |
| Caloosahatchee Formation [Uncommon] |
| 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 Smith, 1936, p. 136-137):
“Shell of medium size, whorls rapidly increasing in size, somewhat compressed; nuclear whorls smooth and apparently partly keeled, adjacent suture well impressed, later becoming less apparent and then broken or puckered by the obliquely variable and irregularly placed growth lines; spiral sculpture consisting after nucleus of regularly placed broad, flattish, indented, ribs, the interspaces narrower, these ribs on the body whorl varying more in width; base destitute of the spiral ribs but with slight indications of lines toward the periphery. Length 25 mm., breadth 20 mm., height 15 mm. Holotype in the writer’s collection. Clewiston, Florida. Pl. 9, figs. 10, 10A.
Dall in his Tertiary Mollusca states on p. 379 that Sinum perspectivum does not antedate the Post-pliocene. S. polandi, apparently its progenitor, actually was dug out with a Pliocene assemblage. Named after William Poland, of West Palm Beach.”
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Measurements: n/a
Other remarks: n/a
References: n/a
Online resources:
Page history:
Some of the content on this page was originally published on the Neogene Atlas of Ancient Life on August 27, 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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