Key: Step 736. Orthocladiinae 148 Rheosmittia

736a. Lateral setae of abdomen long and thoracic horn absent. (Apices of anal lobes distinctly sharp-toothed (058l.jpg)).

Rheosmittia spec-a

736b. If lateral setae long, thoracic horn present.

Step 737. Orthocladiinae 149 Parakiefferiella
Decision path