Truncatellina claustralis
Light cylinder whorl snail ( Truncatellina claustralis )
The Bright cylinder whorl snail ( Truncatellina claustralis ), also called Small cylinder whorl snail is a snail of the family of the diaper snails ( Vertiginidae ) from the subordination of terrestrial snails ( gastropod ).
- 5.1 Literature
- 5.2 Notes and references
Features
The housing of the cylinder Hellen whorl snail is 1.5 to 1.8 mm high and 0.75 mm wide. It has six highly curved turns which are offset from each other by a deep suture. The last whorl is flattened on the outside of something, by the turn appears slightly shouldered. The casing is light yellow horn. The surface is covered with a silky sheen and fine growth lines. The muzzle is pointed - oval. The aperture rim is expanded and strengthened lipped strongly bent especially on the spindle and Basalrand. In the mouth protrude three "teeth" ( parietal, columellar, palatal ) into it. In the frontal view but only the former visible. The palatal tooth sits deeper in the mouth. It is visible through the transparent body from the back as remote white structure.
Similar Species
The housing of the cylinder Hellen whorl snail is similar to the case of the Southern cylinder whorl snail ( Truncatellina callicratis ), but is smaller and slimmer.
Geographical distribution and habitat
The range of the species is highly fragmented and extends from eastern Spain, France, via Switzerland, Northern Italy, Austria, Czech Republic, Slovakia, southern Poland, Hungary, Croatia, Montenegro, Albania, Bulgaria and the Ukraine, the Caucasus and Asia Minor. In the Alps, Spain and Bulgaria it rises to 1000 m above sea level. The species also occurred in northern Germany in the Pleistocene.
The species prefers dry slopes on limestone rocks between boulders, typically in Artemisia and Helianthemum - corridors. In the Alps, it also occurs on exposed south-facing meadows on limestone scree.
Taxonomy
The taxon was described by Vinzenz Maria Gredler 1856 Pupa claustralis first time. It is now generally accepted to the genus Truncatellina. Synonyms are Pupa claustralis var anodus Gredler, 1856 Pupa clavella Reinhardt, 1877, Pupa ( Isthmia ) claustralis Gredl. var corcyrensis O. Boettger, 1883 and Pupa ( Isthmia ) salurnensis Reinhardt, 1877.
Endangering
In Germany the species is lost or extinct, the last evidence comes from 1911. In Austria and Switzerland, the species is considered endangered ( Welter - Schultes ).