Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 844. Orthocladiinae 255 Orthocladius

844a. Abdominal tergites III-VIII or IV-VIII with a conspicuous posterior transverse band of small points, 3-7 points deep, extending 3/5ths to one half the breadth of the segment (073k.jpg; 073l.jpg). Dorsocentral setae narrow (073j.jpg).

Step 845. Orthocladiinae 256 Orthocladius

844b. Abdominal tergites IV-VIII with similar posterior transverse bands, but the points of segments IV-VII larger, darker and fewer (073h.jpg). Dorsocentral setae conspicuously strong, spine-like, separated by much less than their length (073g.jpg).
073-2.jpg species overview

Orthocladius ashei
Decision path