Wollastonaria turricula is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae.

[1] The shell of these snails is shaped like a discus, or a lens, with a sharp edge around the periphery of the whorls.

[3] It may be easily distinguished, through external morphology, from all Hystricella and Wollastonia species from its "peculiarly turreted shell".

[4] Hystricella turricula is endemic to the coastal slopes and plateaus on the islet Ilhéu de Cima on the southeastern coast of Porto Santo.

Significant populational declines have been recorded, and the species is now restricted to one location on a high-altitude plateau.