Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 857. Orthocladiinae 268 Orthocladius

857a. Thoracic horn long, smooth and narrow, brown at base, colourless thereafter (075b.jpg). Brown exuviae with transparent conjunctival bands. Anal lobes rounded externally and tapered from the middle to the apical setae (075d.jpg).
075-1.jpg species overview

Orthocladius frigidus

857b. If thoracic horn long and smooth, its length does not exceed 500µm and the posterior segments of the abdomen are pale.

Step 858. Orthocladiinae 269 Orthocladius
Decision path