Diamesa modesta Serra-Tosio, 1968

The species publication year is here accepted to be 1968 following Ashe & O’Connor (2009). The species is well described by Serra-Tosio (1968) and can be separated from D. latitarsis based on the larger and shorter inferior volsella with dorso-lateral and ventro-medial lobes almost fused. It is known from different localities in the Alps (Rossaro & Lencioni 2015a, b).