Platyla polita
Smooth Mulmnadel ( Platyla polita )
The Smooth Mulmnadel ( Platyla polita, syn. Acicula polita ) also Smooth needle screw is a living on the land snail from the family of Mulmnadeln ( Aciculidae ) in order Architaenioglossa ("old Bandzüngler ").
- 5.1 Literature
- 5.2 Notes and references
- 5.3 online
Features
The case measures 2.6 to 3.4 mm ( 2.4 to 3.85 mm) in height and 1.05 to 1.25 mm (1.05 -1.35mm ) in width ( = thickness). It is cylindrical - shaped tower with 5 ½ to 6 ½ turns and stupfem Apex. The whorls are slightly arched and are offset from each other by a deep suture. You sidelines is approximately straight. The last whorl rises near the mouth of the spiral line of something. The red-brown shell is very stable and transparent. The surface is smooth and very shiny in the living animal. Empty housing but milchigtrüb quickly. The mouth is oval with a weakly reinforced mouth edge. Inner lip is formed a weak and a strong, smooth neck ridge that slopes steeply to the rear ( inside).
The soft body of the animal is bright and translucent, the sensor dark gray to black-gray. They appear through the shell when the animal has withdrawn into the housing.
Similar Species
The housing of the Smooth Mulmnadel is slightly larger and thicker than the body of dainty Mulmnadel ( Platyla gracilis ), and the neck ridge is wider. The species inhabits slightly moister sites in contrast to the Striped Mulmnadel ( Platystyla lineata ).
Geographical distribution and habitat
The range of the species extends from Spain, France, Germany, Switzerland, Austria, Czech Republic, Poland, Slovakia and Hungary to western Russia and the Ukraine, but in most small, non-contiguous occurrences. The southernmost occurrence is in the western North Africa, the northernmost occurrence in Denmark, southern Sweden ( Skåne ) and in the east to Lithuania and western Russia (St. Petersberg ). In the southeast, the species is so far proven to Romania and Bulgaria. In the Middle Pleistocene the type also occurred in England.
The species prefers moderately moist forests or screes, where she lives under the leaf litter, dead wood, under stones or moss.
Taxonomy
The taxon was described by Johann Daniel Wilhelm Hartmann 1840 Truncatella ( Pupula ) acicularis polita first time. The type is in the older literature often than acicula polita (eg Bogon (1990)) or as acicula ( Platyla ) polita to find (eg in Kerney et al. (1983)). Meanwhile, however Moquin - Tandon Platyla 1856 generally recognized as a distinct genus; the kind referred to in recent literature uniformly as Platyla polita.
Endangering
In Germany the species is endangered in Switzerland is the kind potentially at risk (category 3) and in the south of Switzerland already compromised. In Carinthia, the species is classified in category 2, ie she is there at high risk.
Overall, however, the IUCN (= not at risk ) estimates the species as "Least Concern" one.