Cochlodina laminata
Plaited door snail ( Cochlodina laminata )
The plaited door snail ( Cochlodina laminata ) is a species of snail from the family of door snails ( Clausiliidae ).
Features
The body is bulbous fusiform and linksgewunden. It measures 15 to 17 mm in height and is up to 4 mm thick. By the adult stage eleven to twelve weakly convex whorls are formed, the apex is blunt and rounded. The surface of the housing is fine, somewhat irregular growth lines. The color varies from yellowish brown to reddish brown to dark brown. In the fresh state, the shell is glossy and slightly translucent. The housing of older specimens, however, are often corroded and have irregularly distributed whitish spots on. These housings are no longer translucent. The case mouth is ovate, often pointed roughly towards the top. The aperture rim is bent outward and thickened by a white-colored lip. In the parietal region it is located close to the previous handling. Inside the mouth there is a clearly educated upper and lower lamella and three to four weakly developed rugae. Two of these folds are most easily seen in the mouth. A lunar fold absent, as often a palate fold, which, however, can also be made weak.
Geographic occurrence and habitat
The plaited door snail is widely used in Europe and relatively common in appropriate habitats. However, you will go less often, such as in Western France, the British Isles and Ireland to the west. It also lacks a large extent in the Netherlands and immediately adjacent regions of northern Germany, as in most of Scandinavia. There it is only to be found in the southern part. In the south, the range extends to northern Spain, on the Apennine Peninsula to Calabria and on the Balkan peninsula to northern Greece. In the east, the range extends to the Caucasus.
It prefers shady, mostly wet, but sometimes rather dry habitats in deciduous, mixed and coniferous forests and thickets. She lives there gesteinsindifferent under leaf litter, on rocks, stones, tree stumps and decaying wood, often in large colonies. In case of rain and damp weather they often rises to tree trunks. In the Alps, the species is found up to 2300 m above sea level.
Way of life
The plaited door snail feeds on wilted plant parts, and occasionally fungi. The animals are like any door snails hermaphrodites that are mutually beneficial. Mating takes place in August. Only about 10 to 15 max. Formed 17 very rich yolk eggs, which are stored in the leaf litter. The eggs are round, white and measure 2 mm in diameter. Depending on weather conditions and humidity slip the finished pups in late September to early October. They are fully grown after two years and life, at least under farming conditions, up to five years.
System
The species was described by George Montagu in 1803 under the name Turbo laminatus first time scientifically. The type was also long been guided by the synonym Marpessa laminata ( Montagu ).
The plaited door snail is divided by some authors into subspecies:
- Cochlodina laminata kaeufeli Gittenberger, 1967
- Cochlodina laminata klemmi Gittenberger, 1967
- Cochlodina laminata insulana Gittenberger, 1967
- Cochlodina laminata partita ( Westerlund, 1892)
All four species are native to South East Europe. Cochlodina laminata kaeufeli Gittenberger, 1967 was also detected in Carinthia. Occasionally a slightly larger population in the Alps as formatted or subspecies major Schmidt, 1868 will be excreted.
Threats and conservation
The species is listed in the Red List of endangered molluscs was in Berlin as endangered.