Key: Step 620. Orthocladiinae 32

620a. At most 3 lateral setae on segments II-VI, the anterior and posterior being reduced to minute thorns or absent (039g.jpg). Thoracic horn elongate, pointed at tip and coarsely toothed along one side (039b.jpg). Tergites II-III (039c.jpg). Note Or032.

Step 621. Orthocladiinae 33 Heterotanytarsus

620b. 3-4 lateral setae; if very small, thin and hair-like. Thoracic horn small-toothed.

Step 622. Orthocladiinae 34
Decision path