Naked diaper snail
| Naked diaper snail | ||||||||||||
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Bare diaper snail ( Vertigo genesii ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Vertigo genesii | ||||||||||||
| ( Gredler , 1856) |
The bare diaper snail ( Vertigo genesii ) is a species of snail from the family of the diaper snail (Vertiginidae) in the suborder of the land snail (Stylommatophora).
features
The egg-shaped to cylindrical housing is 1.6 to 2.0 mm high and 1.0 to 1.2 mm wide. It has 3.5 to 5 convex turns, which are separated from each other by a deep seam. The mouth is obliquely egg-shaped with a slightly flattened upper edge. It is simple and has no teeth; a weak parietal tooth or callus is very rare. The mouth edge is only slightly thickened and hardly bent. The casing is slightly reddish-brown to dark maroon in color. The surface is only finely striped and therefore very smooth and shiny.
Similar species
The shell is similar to that of the four-toothed diaper snail ( Vertigo geyeri ). Their housing is somewhat more conical and the mouth is reinforced with up to four teeth.
Geographical distribution and habitat
The species is fairly common only in the mountains of central and northern Scandinavia. Isolated occurrences are known from southern Sweden, Finland, Germany, Switzerland, northern Italy, northern England, Scotland and Poland. In Switzerland you can only find them between 1500 and 2100 m above sea level. In England it was found at 300 to 500 m above sea level. According to recent studies, the species is also found in southern Siberia, the Altai, northern Mongolia and the Baikal region, as well as in the Tienschan .
The animals live in open, chalky seepage areas on mountain slopes, on swamp meadows and moist stony mats of the subalpine level on carbonate-rich rock and in swamps. Here they live between plant remains and tufts of vegetation.
Way of life
Little is known about the way of life. Cubs were found in England year round, making up about 55% of the population on average. This results in high mortality. The frequency of the young was highest between August and November.
Taxonomy
The taxon was first described in 1856 by Vinzenz Maria Gredler under the name Pupa Genesii . Some authors subdivide the genus Vertigo into two sub-genera: Vertigo (Vertigo) OF Müller, 1773 and Vertigo (Vertilla) Moquin-Tandon, 1856. In this sub-genus, the four-toothed diaper snail is placed in the genus Vertigo (Vertigo) .
Danger
In Germany, the species is lost or extinct, the last record is from before 1990.
supporting documents
literature
- Michael P. Kerney, RAD Cameron & Jürgen H. Jungbluth: The land snails of Northern and Central Europe. 384 p., Paul Parey, Hamburg & Berlin 1983 ISBN 3-490-17918-8 (p. 94/95)
- Beata M. Pokryszko: The Vertiginidae of Poland (Gastropoda: Pulmonata: Pupilloidea) - a systematic monograph. Annales Zoologici, 43 (8): pp. 133-257, Warsaw 1990.
- Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification = identification book for European land and freshwater mollusks. A1-A3 p., 679 p., Q1-Q78 p., Göttingen, Planet Poster Ed., 2012 ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5 (p. 126)
Individual evidence
- ↑ Stefan Meng: New data on the distribution of the Vertiginidae (Gastropoda: Pulmonata) in Central Asia. Mollusca, 26 (2): pp. 207-219, Dresden 2008 PDF
- ↑ Vincenz Maria Gredler: Tyrol's land and fresh water conchylia. I. The land conchylia. Negotiations of the Zoological-Botanical Association in Vienna (treatises) 6: 25-162, Vienna 1856 Online at www.biodiversitylibrary.org (p. 116) or Table 2, Fig. 3
- ^ Molluscs of Central Europe
- ↑ JH Jungbluth, D. von Knorre (with the assistance of U. von Bössneck, K. Groh, E. Hackenberg, H. Kobialka, G. Körnig, H. Menzel-Harloff, H.-J. Niederhöfer, S. Petrick, K Schniebs, V. Wiese, W. Wimmer, ML Zettler): Red list of internal mollusks [snails (Gastropoda) and mussels (Bivalvia)] in Germany. Announcements of the German Malacozoological Society, 81: pp. 1–28, Frankfurt / M. 2009 PDF ( Memento of the original from June 16, 2013 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (1.3 MB) (p. 8)
Web links
- Molluscs of central Europe Vertigo genesii
- Fauna Europea: Vertigo genesii
- Vertigo genesii inthe IUCN 2013 Red List of Threatened Species . Posted by: Moorkens, E., 2011. Retrieved February 13, 2014.