Vertigo lilljeborgi

Vertigo lilljeborgi is a species of small land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails.^[2]

Subspecies

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

Vertigo lilljeborgi
A damaged shell of Vertigo lilljeborgi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Vertiginidae
Subfamily:	Vertigininae
Genus:	Vertigo
Species:	V. lilljeborgi
Binomial name
Vertigo lilljeborgi (Westerlund, 1871)[1]
Synonyms
Pupa lilljeborgi Westerlund, 1871 Vertigo (Alaea) lilljeborgi (Westerlund, 1871) · alternate representation Vertigo (Vertigo) lilljeborgi (Westerlund, 1871)

Distribution

The type locality for this species is on the southern shore of Tresjön Lake, near Ronneby, Blekinge province, in Sweden.^[3]

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.^[3]

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.^[3]

The width of the adult shell varies from 1.25 to 1.5 mm, the height from 2-2.25 mm.^[3]

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.^[3]