Author: Pagast, 1947
Diagnosis (n=1, material in coll. Serra-Tosio)
Exuviae 3.0mm long.
Cephalothorax: Frontal setae 90µm long. Thoracic horn 150µm long; ThR 19. Precorneal setae 2,3: 100; 80µm long.
Abdomen: Hook row II absent. Armament of abdominal tergites of minute points, about 2.5µm long. Teeth of dorsal tooth rows small, triangular, surmounting a wide basal mound. Total dorsal teeth I-VIII 102. Total ventral teeth IV-VIII 46. Relative length IX:VIII:VII 1.0:0.56:0.83; relative width segments IX:VIII:VII = 1.0:1.2:1.3. Segment VIII 3.2 and segment VII 2.4 times as wide as long. Lateral setae curled; lateral setae 1-4 of segment III 50; 50; -- 43; 25µm long.
Note: Very similar in colour to Diamesa wuelkeri, but paler, less golden and with a broad brownish anterior margin to each segment and brownish lateral adhesion marks. Posterior teeth about 20µm long.
Anal segment: Points of tergite IX even smaller than those of the preceding tergites, not spreading onto the anal lobes. Anal lobe ratio 1.3. Each anal lobe with 3 macrosetae; length macrosetae 0.8x lobe length.
Species keys out at Page 558: Diamesinae 34 Diamesa of the Text Key.
Distribution
Central European Alpine region.
(For more information see module IdentifyIt – file: Other subfamilies).
Ecological notes
Cold glacial torrents at about 2,000m asl.