Key: Step 843. Orthocladiinae 254 Orthocladius

843a. Pedes spurii present on segments I-III. Frontal apotome with conspicuous finger-shaped tubercles (072g.jpg).

Orthocladius saxosus

843b. Pedes spurii B absent. Frontal apotome without strongly projecting tubercles.
069-2.jpg species overview

Orthocladius calvus
Decision path