Danube pond snail
| Danube pond snail | ||||||||||||
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Danube pond snail ( Viviparus acerosus ), shell |
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| Scientific name | ||||||||||||
| Viviparus acerosus | ||||||||||||
| Bourguignat , 1862 |
The Danube marsh snail , also Danube river snail ( Viviparus acerosus ) is a freshwater snail that is placed in the order of the Architaenioglossa .
features
The housings are up to 6 cm high and 4 cm wide. The females are a little slimmer (= smaller width) than the males. The housings are gray-yellow with three more or less clearly developed red bands on the windings. A total of seven turns are formed. The apex is small and pointed. The first two turns increase slightly and are fairly flat, while the following turns increase very quickly, a little more in height than in width. The turns are separated from each other by a well-defined seam.
Habitat and Distribution
The species lives in calm rivers or in lakes, almost exclusively in the Danube area, mainly from Vienna downstream and in an isolated population near Passau . In the Pleistocene , the species was more widespread in Western Europe.
Systematics
The extinct "form" Viviparus acerous f. clactonensis . The systematic status is unclear.
Similar species
In the Italian pond snail ( Viviparus ater ), the first turns increase more in height than in the Danube pond snail, the first two turns of which are very flat.
Danger
The species is endangered in Germany and is therefore on the red list of threatened species in Germany and Austria (2 = endangered). The species is also classified as endangered in the Czech Republic.
literature
- Peter Glöer: The animal world of Germany. Mollusca I Freshwater gastropods of Northern and Central Europe Key to identification, way of life, distribution. 2. rework. Ed., 327 pages, ConchBooks, Hackenheim 2002 ISBN 3-925919-60-0
Web links
- European Viviparidae - Viviparus acerosus
- coryland.de
- Danube pond snail at AnimalBase
- BioLib.cz
- Viviparus acerosus in the Red List of Threatened Species of the IUCN 2013.2. Posted by: Vavrova, L. & Van Damme, D., 2010. Retrieved February 12, 2014.