Turritella
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 Turritella communis
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Turritella apicalis † |
Turritella is a genus of gastropod in the family Turritellidae with highly coiled shells in a pronounced, elongated cone. The shells are quite frequently found as fossils, and the carbonate stone made from large quantities of Turritella shells is often referred to as "Turritella limestone", or, if silicified, "Turritella agate". Both varieties of this stone are commonly sold as polished cabochons.
Turritella species originated in the Cretaceous and span to the present day.
[edit] References
- Mayr, Helmut. A Guide to Fossils. Princeton University Press, Princeton, New Jersey, USA. 1985 (English translation 1992).
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