Key: Step 778. Orthocladiinae 190 Thienemannia

778a. Thoracic horn absent. Posterior transverse row of tergite II restricted to a few teeth medially, or absent (that of tergite III may be absent as well). 062-1.jpg species overview

Thienemannia gracilis

778b. Thoracic horn elongate, smooth (062d.jpg). Posterior transverse tooth row continuous across tergite II.

Thienemannia fulvofasciata
Decision path