Key to males of Yunnanosticta spp.

1. Cerci without any prominent spur or tooth at inferior border near apex; paraproct conical without notched apical portion, only apices upcurved (Fig. 14c–d)...................................................................... Y. siangi

Cerci with a spur or tooth at the inferior border near apex; paraproct conical with notched and upwards curved apical portion.................................................................................................... 2

2. Blue prothorax; cerci globular in dorsal view, tooth-like projection near inferior border of cerci apex; paraproct with a shallow notch (Figs. 14a–b)....................................................................... Y. cyaneocollaris

Dark brown prothorax with two blue spots and blue posterior lobe; cerci roughly conical, a small spur near the inferior border of cerci apex; paraproct deeply notched (Figs. 14e–f).................................................. Y. wilsoni