Common pancake snail

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Common pancake snail
Common poppet snail (Planorbis planorbis)

Common poppet snail ( Planorbis planorbis )

Systematics
Class : Snails (gastropoda)
Order : Lung snails (pulmonata)
Subordination : Water lung snails (Basommatophora)
Family : Plate snails (Planorbidae)
Genre : Planorbis
Type : Common pancake snail
Scientific name
Planorbis planorbis
( Linnaeus , 1758)

The Common plate snail ( Planorbis planorbis ) is a snail from the family of Planorbidae that the subordination of basommatophora within the snails is expected (Pulmonata).

features

The housing has 5.5 to 6 slowly increasing turns. It is up to 3.5 mm thick and up to 18 mm wide. It is almost planispiral, only slightly sunk at the bottom. It is brown and has streaks of growth. A distinct keel is formed on the upper outside.

Reproduction

The animals are hermaphrodites, but self-fertilization can occur. After fertilization, the animals lay 8–10 egg capsules with 3–30 eggs each, which develop in 11–14 days. Ready-made snails hatch from the eggs. The service life is up to 4 years.

Way of life and distribution

The species lives in slow-flowing, plant-rich waters that should, however, have a muddy bottom. The animals live there in the bank area to a depth of about 1 m (but see article Planorbis !). The animals come from Western to Eastern Europe. They are absent in southern Europe and extend in Scandinavia to southern Norway and southern Sweden.

Similar species

The species can be confused with Planorbis carinatus if in some specimens the keel is shifted to the middle of the turn. In case of doubt, however, the species can be distinguished on the basis of anatomical features (sex organs).

Danger

The species is classified as potentially endangered in Austria.

literature

  • Christian Albrecht, Kerstin Kuhn & Bruno Streit: A molecular phylogeny of Planorboidea (Gastropoda, Pulmonata): insights from enhanced taxon sampling. Zoologica Scripta, 36: 27-39, Oxford, 2007, doi : 10.1111 / j.1463-6409.2006.00258.x
  • 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
  • Boschi, Cristina: The snail fauna of Switzerland, a comprehensive picture and identification book. 2011, Bern, Stuttgart, Vienna, p. 165

Web links

Commons : Planorbis planorbis  - collection of images, videos and audio files