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 wuelkeri Serra-Tosio, 1964 ( Fig. 3 A , B) This species is endemic from the Alps ( Serra-Tosio 1964 ; 1968 ). In Italy , an adult male of this species was collected only in Viola stream in July 1985 ( Rossaro & Lencioni 2015a , b ). For details of male genitalia see Fig. 3 A , B. The species can be diagnosed based on the ventro-medial lobe of inferior volsella (“appendice inférieur) that is much better developed than the much reduced dorso-lateral lobe.