Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 628. Orthocladiinae 40 Heterotrissocladius

628a. Larger (4.7-5.7mm long). Points on tergites short, giving a finely dotted appearance (039g.jpg). 4 lateral taeniae on segment VII. Each anal lobe with 28-36 taeniae.
039-2.jpg species overview

Heterotrissocladius marcidus

628b. Smaller (4.0-5.3mm long). Points on tergites recurrent for a short distance giving a streaked appearance (039i.jpg). 3 taeniae and 1 seta laterally on segment VII (the seta is the most posterior and is occasionally developed as a small taenia). Each anal lobe with 17-23 taeniae.

Heterotrissocladius grimshawi
Decision path