Turritella is a genus of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae.

These are species assigned to Turritella that were brought into synonymy with other taxa: The genus is known from the Cretaceous to the Recent periods.

One variety of "Turritella agate", that from the Green River Formation in Wyoming, is a fossiliferous rock which does indeed contain numerous high-spired snail shells.

[91] The rock in which these snail shells are so abundant varies from a soft sandstone to a dense chalcedony.

The Erminger Turritellenplatte ("Turritella plate of Ermingen") near Ulm, Germany[92] is a rocky outcrop situated in the northern part of the North Alpine Foreland Basin.