Vertigo lilljeborgi

Vertigo lilljeborgi is a species of minute land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails.


 * Subspecies:
 * Vertigo lilljeborgi lilljeborgi (Westerlund, 1871)
 * Vertigo lilljeborgi vinlandica Nekola, Chiba, Coles, Drost, Proschwitz & Horsák, 2018

Distribution
The type locality for this species is on the southern shore of Tresjön Lake, near Ronneby, Blekinge province, in Sweden.

This species is known to occur in a number of countries and islands in Northern Europe including:
 * Great Britain, Wales, Scotland
 * Ireland
 * Denmark
 * Germany
 * Scandinavia: Sweden, ...
 * Latvia
 * and other areas

Shell description
The shell is ventricose, ovate, strongly glossy, very finely striate, chestnut horn-color. The shell has 5 whorls, rather rapidly increasing, convex, the last but little higher than the penult, double as high as the next earlier whorl, a little ascending in front. Suture is slightly oblique.

Aperture is quite piriform, or obliquely cordate, with 1 parietal tooth (sometimes with another punctiform one), 2 columellar teeth, the lower very small, often wanting; 2 short, high, equal, immersed teeth in the palate, bounded by a reddish-brown streak in front. Peristome is weak, expanded, the margins delicately united; outer margin not impressed, scarcely produced angularly forward.

The width of the adult shell varies from 1.25 to 1.5 mm, the height from 2-2.25 mm.

Vertigo lilljeborgi, compared with Vertigo moulinsiana, is much smaller, more glossy, its whorls are more tumid, and its thinner lip lacks the broad, almost colorless margin of the latter.