Vertigo ronnebyensis
| Vertigo ronnebyensis | |
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| Apertural view of a shell of Vertigo ronnebyensis | |
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| Subgenus: | Vertigo
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| Species: | V. ronnebyensis
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| Binomial name | |
| Vertigo ronnebyensis (Westerlund, 1871)[2]
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Vertigo ronnebyensis is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.
Shell description
The shell is deeply perforate, long-ovate, regularly finely striate, very glossy and reddish-brown in color. The shell has 5½ convex whorls. The last whorl is about equal to the penult, which is a third higher than the preceding whorl, which is double the height of the next earlier. Last whorl has a transverse callus of the same color near the aperture. Suture is very oblique, ascending to the aperture.[3]
Aperture is quite obliquely piriform, excised by the very oblique parietal wall. Aperture has 4 teeth: 1 parietal lamella, 1 conic tooth at the lower end of the sharply emerging, dark-colored columella; 2 short, widely separated, deeply immersed palatal folds. Margins are delicately united, the outer margin is weakly arcuate, nearly straight, the columellar margin is broadly reflected.[3]
The width of the adult shell is 1.15-1.35 mm, the height is 2.0-2.35 mm.[4]
Distribution
This species occurs in:
Habitat
This species lives in forests.
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.
- ^ Westerlund C. A. 1871. Exposé critique des mollusques de terre et d'eau douce de la Suède et de la Norvége. pp. [1-2], 1-200. Upsal. (Berling).
- ^ a b c d e Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. pages 192-193.
- ^ Species summary for Vertigo ronnebyensis. AnimalBase, accessed 23 June 2009.