Key: Step 637. Orthocladiinae 49 Hydrobaenus

637a. Lateral taeniae of segments V-VIII narrow, about 4µm wide. 2nd dorsocentral seta much longer than the 1st, 3rd and 4th.

Hydrobaenus lunzensis

637b. Lateral taeniae (unpleated) of segments V-VIII wider, 6-8µm wide. 2nd dorsocentral seta not so much longer than the 1st and 4th.

Hydrobaenus conformis
Decision path