Discus (snails)
| Discus | ||||||||||||
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Spotted bowl snail , Discus rotundatus (OF Müller 1774) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Discus | ||||||||||||
| Fitzinger , 1833 |
Discus is a screw - genus from the family of limpets (Patulidae) that is made to the order of snails (Pulmonata).
features
With a shell width of up to 7 mm, the genus contains the largest native species of this family. The bowl snails have a flat, disk-shaped shell, with a more or less pronounced keel on the outside.
Occurrence and way of life
The Discus species live under fallen leaves, wood and stones. The genus occurs Holarctic . The main focus of distribution is with most species in North America.
Systematics
Often found in Central Europe
- Spotted bowl snail , Discus rotundatus (OF Müller 1774),
belongs to the subgenus Gonyodiscus . The
- Brown bowl snail , Discus ruderatus (A. Férussac 1821),
belongs to the nominate subgenus Discus .
Another kind that
- Keeled bowl snail , Discus perspectivus (Megerle von Mühlfeld 1816),
from the subgenus Gonyodiscus lives in the mountains of Southeast Europe and is only found sporadically in Germany.
literature
- Rosina Fechter and Gerhard Falkner: molluscs. 287 pp., Munich, Mosaik-Verlag 1990 (Steinbach's Nature Guide 10) ISBN 3-570-03414-3
