Viviparus
| Viviparus | ||||||||||||
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Pointed pond snail ( Viviparus contectus ), shell |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Viviparus | ||||||||||||
| Montfort , 1813 |
The genus Viviparus includes freshwater snails from the marsh snail family (order Architaenioglossa ). It has been proven since the Jura . The generic name Viviparus means “ viviparous ”, but strictly speaking, the female animals produce eggs, which are carried instead of deposited in the lower fallopian tube ( ovoviviparia ).
features
The housings measure up to 5 cm in height. They are smooth and the whorls are arched. There are flat to highly conical housings. The intraspecific variability can be considerable.
Systematics
For Europe, the fauna Europaea gives five species of the genus Viviparus , z. T. be divided into several subspecies.
- Danube pond snail ( Viviparus acerosus (Bourgouignat, 1862)) (two subspecies)
- Italian pond snail ( Viviparus ater ( de Cristofori & Jan, 1832)) (three subspecies)
- Pointed pond snail ( Viviparus contectus (Millet, 1813))
- Viviparus mamillatus (sexton, 1852)
- Blunt pond snail ( Viviparus viviparus (Linnaeus, 1758)) (two subspecies)
there are also a number of exclusively fossil species; e.g.
- Viviparus diluvianus (Kunth, 1865) ( Middle Pleistocene )
- Viviparus glacialis (S. Wood, 1872) ( Pleistocene )
- Viviparus teschi Meijer, 1990 ( Pleistocene )
- Viviparus gibbus (Sandberger, 1880) ( Quaternary )
- Viviparus symeonidisi Schütt, 1986
- Viviparus suessoniensis (Deshayes, 1826)
- Viviparus suevicus (Wenz, 1919)
- Viviparus sublentus d´Orbigny , 1850
- Viviparus sadleri Partsch, 1856
- Viviparus crytomaphora Brusina, 1874
- Viviparus kurdensis Lörenthey, 1894
u. a. The genus Viviparus is often divided into several sub-genera.
Aquaristics
V. viviparus and V. contectus are most common in Central Europe . Often they are generally referred to as “pond snails”. Both types are offered (usually without a clear distinction!) In the aquarium trade for aquariums and garden ponds , as they rarely or not at all eat living higher plants and are also recommended for combating algae. However, they are less suitable for the latter purpose.
Individual evidence
- ↑ Viviparus . In: The Paleobiology Database. Retrieved December 10, 2011 .
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
