Nidwalden hair snail
| Nidwalden hair snail | ||||||||||||
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| Trochulus biconicus | ||||||||||||
| ( Eder , 1917) |
The Nidwalden hair snail ( Trochulus biconicus , syn .: Trichia biconica ) is a species of snail from the family of leaf snails in the order of land snails (Stylommatophora).
features
The housing is spindle-shaped and has a diameter of five to six millimeters and a thickness of 2.5 to 3.5 millimeters. The skin is pale brown.
Geographical occurrence, habitat and way of life
The range of the snail is very limited, it occurs mainly in a very small area around the Bannalp (community Wolfenschiessen in the canton of Nidwalden ) and near Engelberg ( canton of Obwalden ) as well as partly above Lake Uri . In 2007, populations were found on the following mountains:
- in the canton of Obwalden : on the Ruchstock , the Hanghorn , the Huetstock , on the north side of the Widderfeld Stock and on the Barglen
- in Nidwalden : the Schwalmis , on large stock whales , on Laucherenstock , on the north side of the wind area above the Münggenstöckli , on the rail mount , at Laucherengrat , the rabbits sticks and between the large and chli Sättelistock
- in the canton of Uri : on Uri Rotstock , on Chli Schlieren , on Wissberg , on Surenenpass , on Hoh Brisen and at Wild Alpeli
The snail can only be found at an altitude of 2000 to 2570 m above sea level. M. survive. Due to the rise in temperature due to climate change, the Nidwalden hair snail moves to higher areas. In the distribution area, however, the mountain peaks are usually only about 300 meters higher, so that the evasive maneuver will soon end. Nidwalden hair slugs are no longer found at the lowest-lying sites from the 1980s. In the event that the hair snail's habitat moves further upwards, there are considerations to relocate the animals or bring some specimens to a zoo.
The land snail lives most of the time hidden under flat stones, especially in dormant limestone rubble, on slope edges or hilltops, ridges and summits as well as rock heads and rocky stairs.
Synonymy and nomenclature
The Nidwalden hair snail was first described by Leo Eder on the Bannalp. After individual finds between 2004 and 2006, the Nidwalden biologist Markus Baggenstos recorded the distribution areas and population density of the snail species in a project in 2007.
literature
- Markus Baggenstos: Distribution and biology of the Nidwalden hair snail (Trochulus biconicus) (PDF) , report for the cantons of Nidwalden, Obwalden, Uri and Bern, April 2010
- Leo Eder: A new species of Fruticicola from the Swiss Alps: Fruticicola biconica n. Sp. , Bulletin of the German Malacoological Society, 49 (3): 119–122. Frankfurt am Main.
- Hans Turner: Atlas of the mollusks of Switzerland and Liechtenstein. Fauna helvetica 2 . 527 p., Neuchâtel (Switzerland): Center suisse de cartographie de la faune & Swiss Entomological Society 1998, ISBN 2-88414-013-1 .
- J. Hausser: Identification key for gastropods in Switzerland. Ed. CSCF and SEG series: Fauna Helvetica 10, 2005, CSCF Neuchâtel. 191S.
Web links
- Species protection - New discoveries of the Nidwalden hair snail Trochulus biconicus Eder 1917 (formerly Trichia biconica) , information page on oekoberatung.ch, accessed on December 29, 2013
- Trochulus biconicus , AnimalBase
- Trochulus biconicus , NCBI Taxonomy Browser
- Trochulus (Trochulus) biconicus in Fauna Europaea
- Trochulus biconicus inthe IUCN 2013 Red List of Threatened Species . Posted by: Rüetschi, J., 20010. Accessed February 12, 2014.
Individual evidence
- ↑ a b Baggenstos, 2010
- ↑ distribution map of Trochulus biconicus (Eder, 1917). info fauna, accessed on February 3, 2019 .
- ↑ Nidwalden snail soon reaches the summit. In: Neue Luzerner Zeitung . Archived from the original on December 29, 2013 ; accessed on February 4, 2019 .
- ↑ Endangered biodiversity: winners and losers in 2013 , media release from WWF Switzerland of December 26, 2013
- ^ Nidwalden Haarschnecke , article in Central Switzerland on Sunday , December 29, 2013, p. 32