Globular heather snail
| Globular heather snail | ||||||||||||
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Globular heather snail ( Helicella bolenensis ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Helicella bolenensis | ||||||||||||
| ( Locard , 1882) |
The Spherical heath snail ( Helicella bolenensis ) is a snail from the family of Geomitridae that the order of terrestrial snails is expected (gastropod).
features
The spherical, slightly pressed case is 6.5 to 11.5 mm high and 8 to 14 mm wide. It has 5½ to 6 curved whorls with a deep seam; the outline is straight. The open navel is narrow and takes up about one sixth of the width of the case. In the spindle area it is somewhat covered by the mouth edge that is turned over there. The last turn does not descend towards the mouth. The mouth is rounded-elliptical. The mouth edge is sharp and only slightly turned over at the base towards the spindle. A strong white lip is formed inside.
The housing is whitish or yellowish with a solid shell. The surface only shows regular, clear growth stripes. The drawing consists of weak, often interrupted, reddish bands on or slightly below the periphery. The housings can also be without a drawing.
Similar species
The Mediterranean heather snail ( Cernuella virgata ) and the spotted heather snail ( Candidula intersecta ) are coarser and more irregularly striped and shouldered or edged on the periphery. The latter cases also have a slightly weaker seam.
Geographical distribution and habitat
The range of the species is very dispersed and extends from Catalonia to southern France (Dépts. Gers , Aude , Bouches-du-Rhône and Ardèche ). The globular heather snail was also introduced to Germany. The colonies in Mecklenburg-Western Pomerania and near Ochsenfurt (district of Würzburg, Bavaria) still exist at the moment. The colony near Ludwigshafen am Rhein described by Dietrich von der Horst has since expired (Welter Schultes).
The species prefers exposed, sandy and stony, dry grasslands. In dry phases it likes to climb up grass and herbaceous plants and stays dry.
Taxonomy
The taxon was first described by Arnould Locard in 1882 as Helix bolenensis . Today it is uniformly placed under the genus Helicella .
Danger
The globular heather snail is threatened with extinction in Germany according to the Red List. The species has already become extinct again in Rhineland-Palatinate. The IUCN classifies them as data deficient .
supporting documents
literature
- Rosina Fechter, Gerhard Falkner: Mollusks. 287 p., Mosaik Verlag, Munich 1990 (Steinbach's natural guide 10.) ISBN 3-570-03414-3 (p. 210)
- 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 (p. 249)
- Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification = identification book for European land and freshwater mollusks. A1-A3 S., 679 S., Q1-Q78 S., Göttingen, Planet Poster Ed., 2012 ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5
On-line
Individual evidence
- ↑ Miquel Bech: Fauna malacològica de Catalunya: molluscs terrestres i d'aigua dolça. 229 pp., Barcelona, Institució Catalana d'Història Natural, 1990 8 Series: Treballs de la Institució Catalana d'Historia Natural, Filial de l'Institut d'Estudis Catalans, ISSN 0211-707X
- ↑ Uwe Jueg: A new location of Helicella bolenensis (Locard 1882) in Mecklenburg-Western Pomerania (Gastropoda: Hygromiidae). Communications of the German Malacozoological Society, 64: 1-15, Frankfurt am Main 1999 PDF
- ↑ Mollusks in and around Rhineland-Palatinate: Helicella bolenensis (Globular Heideschnecke) ( Memento of the original from September 25, 2015 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.
- ^ Dietrich von der Horst: Helicella (Helicella) bolenensis (Locard) near Ludwigshafen a. Rh. Archives for Molluscology, 89 (4/6): 215-218, Frankfurt / M., 1960.
- ^ Arnould Locard: Prodrome de la malacologie française. Catalog général des mollusques vivants de France. Mollusques terrestres, des eaux douces et des eaux saumâtres. Pp. I-VI, 1-462. Lyon, Georg & Paris, Baillière, 1882 Online at Biodiversity Heritage Library , pp. 96, 323
- ↑ Fauna Europea: Helicella bolenensis (Locard 1882)
- ^ Vollrath Wiese: The land snails of Germany. 352 pp., Quelle & Meyer, Wiebelsheim 2014 ISBN 978-3-494-01551-4 (p. 271)
- ↑ Gargominy, O., Falkner, M. & von Proschwitz, T. 2013. Helicella bolenensis. The IUCN Red List of Threatened Species 2013: e.T156588A4968734. doi : 10.2305 / IUCN.UK.2011-1.RLTS.T156588A4968734.en .
