DistributionRead full entry
Range DescriptionThis is a widespread species in Europe according to Fauna Europea (Bank et al, 2006). Some older distributional data might refer to B. troscheli which is now considered to be a distinct species. Fauna Europaea lists the following countries: Austria, Balearis Islands, Belgium, U.K. - Great Britain, Bulgaria, Czech Republic, Denmark, Estonia, France, Germany, Hungary, Ireland, Italy, Russia, Latvia, Lithuania, Macedonia, Poland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, The Netherlands, Ukraine, Serbia.
Czech Republic: Bithynia leachii (Sheppard, 1823) and Bithynia troschelii (Paasch, 1842) are both recorded in the Czech Republic, where both species are restricted to South Moravia; in the floodplains along the Morava River and the Dyje River where both species are very rare.
UK: Bithynia leachii (Sheppard, 1823) is widespread in lowland rivers, but is believed to have declined over the last 50 years (Killeen, pers. comm, 2009). Slovakia: Mainly the Danube and Morava River. Also in the Latorica River and slow flooding canals and oxbows, and fishponds.Germany: Common in the north part. In the southern part only in the River Rhein, Neckar and Chiemsee.
Bulgaria: Bithynia rumelica Wohlberedt, 1911 was considered a synonym of Bithynia (Codiella) leachii by Angelov (2000). Georgiev (2010) noted that it was described as a new species from a thermal spring (water temperature 20° C) in the Rhodopes Mountains near the town of Krichim (Wohlberedt, 1911). The only known such spring is Krichimski Vircheta, near the Vacha River.
This species has a Palaearctic range, occurring principally in the lowlands of northern, central and eastern Europe plus southern