The species of the genus Diamesa (Diptera, Chironomidae) known to occur in Italian Alps and Apennines Author Montagna, Matteo Author Urbanelli, Sandra Author Rossaro, Bruno text Zootaxa 2016 4193 2 317 331 journal article 10.11646/zootaxa.4193.2.7 4a1140ea-fe86-4b33-9ee7-2f933c97a856 1175-5326 166939 A1A56E2F-3A9A-4A07-B3BB-EE50B669FB50 Diamesa laticauda Serra-Tosio, 1964 The species is very rare in the Alps. It is recorded only in few localities: Estellette glacial stream, Veny Valley ( Val d’Aosta ), 11IX1995 , 12IX1997 ; Lys Glacial stream 30VI1987 ; Vedretta de la Mare (Adamello) 31VII2002 . It can be easily distinguished by the expansion of the gonostylus and the large pars ventralis ( Serra-Tosio 1964 ).