Kingdom Animalia Superfamily Pupilloidea Subfamily Vertigininae Scientific name Vertigo heldi Rank Species | Class Gastropoda Family Vertiginidae Tribe Vertiginini Phylum Mollusca | |
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Similar Vertigo, Vertigo ronnebyensis, Vertigo alpestris, Truncatellina costulata, Vertigo lilljeborgi | ||
Vertigo heldi is a species of minute, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snail.
Contents
Distribution
This species occurs in:
Shell description
The shell is rimate, turrited, irregularly and very finely striate, of reddish-brown color, glossy. The shell has 6 whorls, that are slowly increasing and rather convex. The first 3 whorls form a blunt summit which is about ⅓ the length of the shell. The last 3 whorls are of nearly equal height and form the remaining cylindric part of the shell. The last whorl is neither calloused nor contracted preceding the aperture.
The aperture is about ¼ the length of shell, arcuately convex, somewhat impressed on the outer side, the impression running as a groove-like depression for a short distance on the last whorl. Aperture is toothed, the teeth are reddish, very weak and placed deep in the throat: 1 tooth on the middle of the parietal wall, 1 on the columella, 2 very weakly developed, frequently wanting, on the palatal wall. Peristome is continuous, somewhat expanded, little thickened.
The width of the adult shell is 1.1-1.25 mm, the height is 2.4-2.7 mm.