DistributionRead full entry
Range DescriptionHas a very widespread but highly scattered and disjunct range being recorded from localities in Europe, China and Japan.
In Germany it is nationally red listed as Endangered; it is known to be extant at one site only and there have been repeated unsuccessful searches searched at other older known sites (Lübenau-Nestle pers. comm. 1998). One of the old sites was recently destroyed by road construction. In Switzerland it is considered to be Extinct in the Wild (one site known, last observation in 1981). In Austria considered as Extinct in the Wild, with two old sites. Outside Europe found in Japan (one site Honshu) and China (two sites: Sichuan and Hunan).