Truncatellina arcyensis
Truncatellina arcyensis
Truncatellina arcyensis, in German also smooth cylinder whorl snail [Note 1] is a species of snail from the family of the diaper snails ( Vertiginidae ) within the suborder of terrestrial snails ( gastropod ).
Features
The cylindrical body is 2.2 to 2.4 mm high (2.2 to 2.5 mm: Schultes Welter ) and 0.9 mm wide. It has up to seven weakly curved turns, which are separated with a flat seam. The mouth is without teeth and the mouth rim is only slightly thickened. The outer and spindle lip is only slightly bent back. The housing is yellowish- brown. The surface is matt and has irregular growth lines on.
Geographical distribution and habitat
The area of the species is at three locations on the valley slopes of the Cure at Arcy- sur-Cure and Saint- Moré and in the valley of the Yonne at Mailly -le- Château ( between Auxerre and Avallon, Yonne, France ) is limited. The localities are about 130 m to 200 m above sea level.
Very doubtful is the discovery of a flooded into empty housing in the Canal d' Orny Entreroches in the canton of Vaud ( Switzerland ).
The animals live on the sites mentioned on dry meadows on rocky slopes on calcareous subsoil.
Taxonomy
The taxon was described in 1943 by Walter Klemm first time. The species is generally recognized. There are no known synonyms.
Endangering
Due to the extreme geographical restriction on the few locations the species is endangered. It is therefore particularly protected in France.