Range Description

This species was originally known to be widespread in Europe extending in the north to Denmark, east to Italy and to Portugal in the West. Nowadays, it only occurs in France and Spain and is extinct in the rest of Europe (Araujo and Ramos 2001). The current range of this species is recorded from part of the rivers Charente, Vienne and Creuse in France and part of the Ebro river in Spain. Therefore, the species is known from four locations, namely the Charente, Vienne, Creuze and Ebro rivers, with a possible fifth one which has to be confirmed (Dronne river in France). In parts of the range the species has been extinct for hundreds of years (UK), whereas in other regions the decline and disappearance happened in the last century.