Diamesa tskhomelidzei

Author: Kownacki and Kownacka, 1973

Diagnosis (Material in coll. Kownacki)
Exuviae 4.4mm long.
Colour: Abdominal segments evenly buff, the posterior teeth (40µm long) brown tinged with gold set on a narrow transverse band of the same colour; postero-lateral corners of the segments similarly coloured.
Cephalothorax: Frontal setae 153µm long. Thoracic horn 255µm long; ThR 19.6. Precorneal setae 2,3: 95; 155µm long.
Abdomen: Hook row II absent. Total dorsal teeth I-VIII 98+. Total ventral teeth III-VIII 68+. Relative length IX:VIII:VII 1.0:0.56:0.93; breadth IX:VIII:VII 1.0:1.3:1.6. Segment VIII 3.25 and segment VII 2.3 times as wide as long. Points of abdominal tergites small, about 3.5µm long. Lateral margins of tergites II-V smooth or indistinctly serrate posterior to setae 1 and 2. Lateral setae 1-4 of segment III 60; 53; -- 63; 85µm long.
Anal segment: Anal lobe ratio 1.5. Each anal lobe with 3 macrosetae; length macrosetae 0.63x lobe length. (n=1).

Species keys out at Page 559: Diamesinae 35 Diamesa of the Text Key.

(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Caucasian mountains: cold river, 2,000m asl.