Diamesa permacra (Walker, 1856)

Diamesa permacra (Walker, 1856) View in CoL

( Fig. 1 View FIGURE 1. A C, D)

The species can be easily identified on the basis of the shape of the aedeagal lobe bearing only fine spines at apex ( Fig. 1 View FIGURE 1. A C, D). There is an old drawing of this species ( Pagast 1947), and the most recent ones are in Serra-Tosio (1971b). In the paper with the original description of D. thomasi Serra-Tosio, 1970 (the dampfi group), some other diagnostic details are also provided.

In Italy, only an adult male associated to pupal exuviae was collected in Acqualba stream in 1978 ( Prealps, NO). Larvae and pupal exuviae cannot be separated from D. dampfi ; the larvae and pupae recorded in few localities in Prealp springs ( Rossaro & Lencioni 2015a, b) probably belong to D. permacra .