Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 38. Tanypodinae 24 Apsectrotanypus

38a. Plastron plate a narrow band across the apex of the thoracic horn. Anterior lateral taenia of segment VII at 0.20-0.29 segment length (m=0.23, n=6) (fig. b). Anal lobes longer, about 2.25 times or more the length of segment VIII (011f.jpg).
Note Ta24.
011-2.jpg species overview

Apsectrotanypus trifascipennis

38b. Plastron plate of thoracic horn at least half as long as broad. Anterior lateral taenia of segment VII at 0.44-0.55 segment length. Anal lobes shorter, at most hardly exceeding twice the length of segment VIII (011c.jpg).

Step 39. Tanypodinae 25 Derotanypus/Psectrotanypus
Decision path