Key: Step 712. Orthocladiinae 124 Tvetenia

712a. Tergite I with several points on the posterior paired humps (053j.jpg). Thorax granulate to rugosely granulate.

Tvetenia discoloripes

712b. Tergite I without points on the posterior humps. Thorax wrinkled near suture.

Tvetenia verralli
Decision path