Diamesa vaillanti Serra-Tosio, 1972

The species is well described and illustrated by Serra-Tosio (1972). It is very near to D. zernyi, but can be distinguished by the shorter and larger gonocoxite and inferior volsella (Serra-Tosio 1972). The species inhabits glacial streams, and it is widespread in cold waters at high altitudes (Rossaro & Lencioni 2015a, b).