Vertigo antivertigo

Vertigo antivertigo is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails.

[3] This species occurs in countries and islands including: The shell is rimate, oval, ventricose, nearly smooth, glossy, amber-brown or nearly chestnut, slightly transparent, outlines very convex.

Whorls are rather convex, the last somewhat compressed below, with an impression over the lower palatal fold, a moderately developed, opaque crest behind the peristome; and a very deep impression between the crest and the point of the outer lip.

Peristome is thin, a little expanded, the outer margin biarcuate, with a median entering angle.

[6] This article incorporates public domain text from reference.

Two views of a shell of Vertigo antivertigo
A juvenile shell of Vertigo antivertigo