page_title: Turritella
section_title: Fossil species
hierarchical_section_title: Turritella / Fossil species
caption_attribution_description: Turritella incrassata - Fossil gastropod from Pliocene deposits near Antwerp (Belgium)
context_page_description: Turritella is a genus of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae.
  They have tightly coiled shells, whose overall shape is basically that of an elongated cone.
  The name Turritella comes from the Latin word turritus meaning "turreted" or "towered" and the diminutive suffix -ella.
context_section_description: The genus is known from the Cretaceous to the Recent periods.
  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.
caption: Fossil specimens of Turritella incrassata
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