Vertigo heldi | |
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The shell of Vertigo heldi | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Superfamily: | Pupilloidea |
Family: | Vertiginidae |
Subfamily: | Vertigininae |
Tribe: | Vertiginini |
Genus: | Vertigo |
Subgenus: | Vertigo |
Species: | V. heldi |
Binomial name | |
Vertigo heldi (Clessin, 1877)[1] |
Vertigo heldi is a species of small land snail from the family Vertiginidae.
Contents |
The shell 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.[2]
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.[2]
The width of the adult shell is 1.1-1.25 mm, the height is 2.4-2.7 mm.[3]
This article incorporates public domain text from reference [2].