Key: Step 580. Diamesinae 56 Diamesa

580a. Points of tergite III about 5µm long. Best developed dorsal teeth less than 50µm long, black, set on a broad golden mound. Segment VIII about 2.5 times as broad as long.

Diamesa arctica

580b. Points of tergite III 8-10µm long. Best developed dorsal teeth about 100µm long, golden to brown. Segment VIII broader.

Step 581. Diamesinae 57 Diamesa
Decision path