Key: Step 646. Orthocladiinae 58 Hydrobaenus

646a. Exuvial length over 6mm. Longest fringe taeniae 150µm long or more, 10µm wide (041h.jpg).

Hydrobaenus pilipes

646b. Exuvial length under 5mm. Longest fringe taeniae about 70µm long, 3.5µm wide.

Hydrobaenus cranstoni
Decision path