Vertigo antivertigo
| Vertigo antivertigo | |
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| shells of Vertigo antivertigo | |
NE[1]
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| Subgenus: | Vertigo
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| Species: | V. antivertigo
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| Binomial name | |
| Vertigo antivertigo (Draparnaud, 1801)[2]
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Vertigo antivertigo is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae.
Distribution
This species occurs in countries and islands including:
Shell description
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.[3]
Aperture having 6 principal and usually several smaller teeth: parietal lamella rather long; angular and infraparietal short and smaller. Columellar lamella large, ascending inwardly. Upper and lower palatal folds strong, the lower longer. Basal fold stout, in a subcolumellar position. Usually there are small suprapalatal and infrapalatal denticles. Peristome is thin, a little expanded, the outer margin biarcuate, with a median entering angle. Palatal callus is well developed.[3]
The width of the adult shell varies from 1.2 to 1.4 mm, the height from 1.95-2.25 mm.[3]
References
This article incorporates public domain text from reference [3].
- ^ IUCN 2007. 2007 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 19 September 2008.
- ^ Draparnaud J. P. R. 1801. Tableau des mollusques terrestres et fluviatiles de la France. pp. [1-2], 1-116. Montpellier, Paris. (Renaud; Bossange, Masson & Besson).
- ^ a b c d Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 163-164.