Plancia ëd Neoperla

Descrission:

Figure 2.Neoperla nigromarginata Li & Zhang, sp. n. Male. a Dorsal aspect of aedeagal sac, top view b Aedeagus, lateral view. Note that the spines in b appear lightly pigmented and unclear, actually they are located on the lower surface of the sac, and are seen from beneath through the cuticle.