Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 551. Diamesinae 27 Diamesa

551a. Apical setae of anal lobes straight and only 1/3rd the length of the lobe (029h.jpg). Thoracic horn absent. Dorsal teeth numerous but feeble (029g.jpg).

Diamesa steinboecki

551b. Apical setae of anal lobes at least partially hooked apically, at least half the anal lobe length. Thoracic horn present. Dorsal teeth usually strong.

Step 552. Diamesinae 28 Diamesa
Decision path