Neoperla sinensis, Chu, 1928

Li, Weihai & Yan, Yanhua, 2021, Two new species and a new synonym of Neoperla (Plecoptera: Perlidae) from China, with proposal of a new species group, Zootaxa 5047 (4), pp. 431-443 : 432

Neoperla sinensis species subgroup

Diagnostic characters. This subgroup can be characterized by aedeagal sac with a pair of apical sclerites in males.

Remarks. Most of the included species also have the following characters: 1) head with subquadrate interocellar marking and dark femorotibial joint; 2) tergum 7 with additional paired medial processes besides the usual posterior process; 3) the sac forming a basal loop (its presence sometimes depending on the strength of press/soaked time in alkaline solution during eversion); 4) hemitergal process with a wider base. These facultative characters assist much in the recognition of this subgroup.