Charpentieria dyodon
Simplon - door snail ( Charpentieria dyodon )
The Simplon - door snail ( Charpentieria dyodon ) is a species of snail from the family of door snails. The species is interpreted as Reliktendemit of also always free of ice during the ice ages served areas.
Features
The body is fusiform and linksgewunden. It has about 9 turns and measure 10-13 x 2.6-3 mm. The muzzle has wrinkles and fins as well as the typical door snails locking plates ( clausilium ). The animal can withdraw into the shell completely.
Geographical occurrence, habitat and behavior
The Simplon - door snail has only been on the Simplon Pass in the Alps (Valais, Switzerland ) at an altitude 880-1120 m above sea level. M. found. If, however, the extended Artumfang accepted (see under synonymy and nomenclature ), the species occurs (west of Biella) in Piedmont (Italy ), near the southern slope of Mount Bo di Valsesia, in the Valle Sessera, in the valley of the Dora Riparia and Nietro as well as in the canton of Ticino in the area of Lago Maggiore ( Switzerland ) before. The species lives on steep to vertical rock in humid habitats in 850 to about 1150 m. In case of bad weather it lives hidden in rock crevices or mosses.
Synonymy and nomenclature
The species was described by Samuel Emanuel Studer 1820 de name Glischrus ( Clausilia ) dyodon first time scientifically. The type appears frequently with the misspelling diodon in the literature. Some authors see the following species as junior synonyms of C. dyodon: " Clausilia " thomasiana ( Küster, 1850) and Clausilia ( Pedemontiana ) Baudii Pini, 1885 This is important, since the geographical area of distribution increased significantly in this interpretation of the Artumfangs. . The website " Molluscs of Central Europe" holds Charpentieria dyodon and Charpentieria thomasiana for specifically different, while the Fauna Europaea thomasiana treated as a subspecies of Charpentieria dyodon. "Animal Base holds the two " species ", however, for Synonyms Other authors still make next thomasiana other subspecies to the species C. dyodon ( Studer ). :
- Charpentieria dyodon paulucciana ( Pollonera, 1885)
- Charpentieria dyodon Emeria ( Bourguignat, 1877)
- Charpentieria dyodon alpina ( Stable 1859)
- Charpentieria dyodon studeri ( Pini 1884)
- Charpentieria dyodon thomasiana ( Küster, 1850)
Would the Artumfang and the geographical distribution further enlarge.
Endangering
The species is on the Red List of Switzerland. It is classified there as " CR" ( = critically endangered ), according to the status of " critically endangered " in Germany.