Vertigo arctica
| Vertigo arctica | |
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| Apertural view of a shell of Vertigo arctica | |
NE[1]
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| Subgenus: | Vertigo
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| Species: | V. arctica
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| Binomial name | |
| Vertigo arctica (Wallenberg, 1858)[2]
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Pupa arctica Wallenberg, 1858 | |
Vertigo arctica (Wallenberg, 1858) is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.
Distribution
This species occurs in:
Shell description
Shell is dextral, rimate, ovate, thin, smoothish, somewhat glossy, pellucid, brownish-tawny. The shell has 5 to 5 ½ whorls, convex, the last nearly two-fifths the altitude, rounded at base, anteriorly having a somewhat swollen crest.[4]
Aperture is slightly oblique, semiovate or piriform, obstructed by 3 teeth: in the middle of the parietal wall, on the columella, and a smaller one in the palate (frequently wanting). Peristome is spreading, slightly labiate, the margins joined by a callus, the right margin very strongly curved above, columellar margin is somewhat dilated, spreading.[4]
The width of the adult shell is about 2.5 mm, the height about 1.5 mm.[4]
References
This article incorporates public domain text from reference.[4]
- ^ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 20 June 2007.
- ^ Wallenberg C. von 1858. Beschreibung einer neuen Pupa. Malakozoologische Blätter 5: 32. Cassel.
- ^ Beata M. Pokryszko. "Vertigo arctica (Wallenberg, 1858)". Instytut Ochrony Przyrody Polskiej Akademii Nauk.
- ^ 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 189.