Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 849. Orthocladiinae 260

849a. Hook row II short, less than 0.34 the breadth of segment II, usually of 3 or more transverse rows of hooks, or absent (its position occupied by a band of anteriorly directed spinules). Anal lobes often with additional teeth laterally or apically. 4 dorsocentral setae, the 1st, 3rd and 4th thick, the 2nd conspicuously thinner.

Step 850. Orthocladiinae 261 Orthocladius

849b. Hook row II present, longer, more than 0.35 the breadth of segment II; if short, of 2 rows of hooks with the 3rd represented at most by 1-2 hooks. Anal lobes very rarely with additional teeth laterally or apically. Dorsocentral setae without great differences in breadth.

Step 877. Orthocladiinae 288 Acricotopus
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