Chironomidae Exuviae
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Chironomidae Exuviae
Key: Step 839. Orthocladiinae 250 Symbiocladius

839a. Antennal sheath base with a sharp brown tooth (072b.jpg). Tergites III-VIII with a posterior transverse band of small points; III-V also with an apical band of small hook-like points; posterior tergites with a variably developed antero-median patch of row shagreen (072-1.jpg, fig. a). (Thoracic horn absent.)

Symbiocladius rhithrogenae

839b. Antennal sheath base without a sharp tooth. Tergites armed differently.

Step 840. Orthocladiinae 251 Orthocladius
Decision path