Key: Step 683. Orthocladiinae 95 Psectrocladius

683a. Lateral setation of segment VI of the arrangement: seta-taenia-seta-taenia (anterior to posterior), the setae small and fine (049j.jpg).

Psectrocladius limbatellus

683b. Lateral setation of segment VI various but very rarely approaching the above.

Step 684. Orthocladiinae 96 Psectrocladius
Decision path