Snail
| Snail | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Snail ( Rumina decollata (Linné, 1758)) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Rumina decollata | ||||||||||||
| Linnaeus , 1758 |
The stump snail ( Rumina decollata ) is one of two European species of the genus and species-rich-based almost exclusively in the tropics and subtropics family of subulinidae (Subulidae). The snail got its (species) name because it sheds the uppermost parts of the shell with age.
features
The case is slim and conical with many passages. A maximum of 8 to 9 passages are formed, then the top parts of the housing are thrown off. The gap is closed again from the inside. The adult animal only has about 3 to 6 whorls. The housing is therefore only max. 40 mm high. The passageways are usually not very curved, so the seams are not very deep. The outline of the juvenile, not yet truncated animals is even slightly concave. The color is brownish to creamy and shiny. The surface is only slightly ornamented with growth strips and intersecting spiral strips. The opening is egg-shaped with simple edges, rarely with thickened edges.
Occurrence and way of life
The snail is widespread in the Mediterranean region (southern Europe, North Africa, western Asia) and almost always occurs near the coast. It lives in dry, open habitats on stones in the wasteland or bushes on mostly calcareous soils. In southwest France it penetrates as far as the Garonne. The species has now been introduced almost all over the world. It is the most common snail in some areas in the US Gulf States and can affect populations of other, smaller snails. The animals are hermaphrodites that fertilize each other, but self-fertilization also occurs when there is a lack of partners. They lay very large eggs, up to 2 mm in diameter, with a firm lime shell. Life expectancy is around 1½ years, during which around 200 to 500 eggs are laid. They mainly eat the clutches of other snails as well as other smaller snails (especially slugs) and worms. They are therefore already used for biological control of unwanted snails in the garden. But decaying plant material and living plants were also eaten under laboratory conditions.
Individual evidence
- ↑ Gulf States Marine Fisheries Commission ( Memento of the original from August 19, 2006 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.
- ↑ Archived copy ( memento of the original from October 16, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
literature
- K.-H. Beckmann: Additional notes on Rumina decollata in Shanghai, China (Gastropoda: Stylommatophora: Subulinidae). Schriften zur Malakozoologie, 17: 43 Cismar 2001 ZDB -ID & key = zdb 27154-8
- Claudio G. De Francesco and Humberto Lagiglia: A predatory land snail invades central-western Argentina. Biological Invasions, 9 (7): 795-798, Dordrecht 2007 doi : 10.1007 / s10530-006-9076-7
- Rosina Fechter and Gerhard Falkner: molluscs. 287 pp., Mosaik-Verlag, Munich 1990 (Steinbach's Nature Guide 10) ISBN 3-570-03414-3
- Michael P. Kerney, RAD Cameron & Jürgen H. Jungbluth: The land snails of Northern and Central Europe. 384 pp., Paul Parey, Hamburg & Berlin 1983 ISBN 3-490-17918-8
- Victor Millard: Classification of the Mollusca. A Classification of World Wide Mollusca . Rhine Road, South Africa 1997 ISBN 0-620-21261-6
- Akihiko Matsukuma, Sadayoshi Akizuki, Shizuka Akizuki and Hisakatsu Minei: The accidentally introduced land snail Rumina decollata (Gastropoda: Subulinidae) in Fukuoka Prefecture, western Japan, and its dispersion coefficient. The Malacological Society of Japan 37 (1): 7-12, Tokyo 2006 ISSN 1348-2955
- Uri J. Bar-Zeev and Henk K. Mienis: A Record of Rumina decollata from a second area in China (Gastropoda, Subulinidae). Tentacle, 15: 10-11, Cambridge 2007 ISSN 0958-5079 ( PDF )
