Diamesa sakartvella

Author: Kownacki and Kownacka, 1973

Diagnosis (n=1, material in coll. Kownacki)
Exuviae 4.5mm long.
Colour: Pale tan; tergites margined anteriorly (in front of the dark golden anterior transverse apodeme) and laterally along the lateral adhesion marks with brown.
Cephalothorax: Frontal setae 170µm long. Thoracic horn 252µm long; ThR 19.4. Precorneal setae 2,3: 145; 125µm long.
Abdomen: Total dorsal teeth II-VIII 124; teeth golden, narrow, merging into the basal mounds; apical part of teeth 33µm long. Total ventral teeth III-VIII 74+. Shagreen points of tergites III-VII restricted to between the anterior adhesion marks though they may spread outwards a little between the anterior and posterior adhesion marks (031c.jpg); points of tergite III 5µm long. Relative length segments IX:VIII:VII = 1.0:0.53:0.71; relative width segments IX:VIII:VII = 1.0:1.2:1.4. Lateral setae 1 and 2 approximate, well-separated from 3 on abdominal segments. Lateral setae 1-4 of segment III 70; 55; -- 75; 75µm long.
Anal segment: Anal lobe ratio 1.4. Each anal lobe with 3 macrosetae; length macrosetae 0.74x lobe length.

Species keys out at Page 569: Diamesinae 45 Diamesa of the Text Key.

Caucasian mountains and Lebanon.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Caucasian mountains: glacial brook, 1,700m asl.