Spire (mollusc)
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The Spire in a mollusc shell constitutes all the whorls of a spiral shell except for the body whorl.
Turbinoform, Turbinate: having a broadly conical spire and convex base, as in Turbo. Turban-shaped.
Turriform: With a many whorled, slender spire, as in Turritella.
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