Diamesa aberrata Lundbeck, 1898

The most recent illustrations of male genitalia of this species are given in the thesis of Serra-Tosio (1971b), in Hansen & Cook (1976) and in Makarchenko (1985). Pagast (1947) described but did not illustrated the species. The species inhabits glacial streams as well as cold springs and streams (Rossaro & Lencioni 2015a, b).