Key: Step 639. Orthocladiinae 51 Hydrobaenus

639a. Thoracic horn sharply pointed apically (041b.jpg). Anal macrosetae rather strongly hooked (041c.jpg).

Step 640. Orthocladiinae 52 Hydrobaenus

639b. Thoracic horn rounded apically (041d.jpg). Anal macrosetae weakly hooked apically, about as long as the anal lobes (041e.jpg).

Hydrobaenus spinnatis
Decision path