Key: Step 871. Orthocladiinae 282 Orthocladius

871a. Larger exuviae, over 5.5mm long; thoracic horn over 400µm long (078e.jpg).

Orthocladius glabripennis

871b. Smaller exuviae, less than 5mm long; thoracic horn less than 300µm long.

Orthocladius lapponicus
Decision path