Key to Sinacroneuria males from Zhejiang Province 1. Head without dark spot in ocellar triangle.................................................................. 2 -. Head with dark spot in ocellar triangle..................................................................... 3 2. Paraproct form blunt uncinate process; aedeagus not described (Wu 1938)........................... S. quadriplagiata -. Paraproct recurved upward to be pointed process (Fig. 1b)........................................... S. parallela 3. Sensilla basiconica patch of tergum 10 mostly fused (Fig. 2d)......................................... S. complana -. Sensilla basiconica patch of tergum 10 separated............................................................ 4 4. Sensilla basiconica patch of tergum 9 separated (Fig. 3 in Yang & Yang, 1995)........................... S. orientalis -. Sensilla basiconica patch of tergum 9 mostly fused.......................................................... 5 5. Aedeagal Y-arms almost straight......................................................................... 6 -. Aedeagal Y-arms curved............................................................................... 7 6. Apex of aedeagal Y-arms closed to each other (Fig. 4 in Yang and Yang 1998)................................. S. yiui -. Apex of aedeagal Y-arms separate from each other (Fig. 12 in Yang & Yang, 1998)........................... S. sinica 7. Lateral sclerites of aedeagal middle part folded inward (Fig. 16 in Yang and Yang 1998)......................... S. wui -. Lateral sclerites of aedeagal without folded................................................................ 8 8. Y-arms extended into S-shape and apex closed (Fig. 3d).......................................... S. longiprojecta -. Y-arms curved outside, closed in the middle and apex separated (Fig. 8 in Yang and Yang 1998)........ S. longwangshana

Published as part of Xiang, Ya-Nan, Huo, Qing-Bo & Du, Yu-Zhou, 2022, Three new species of Sinacroneuria Yang & Yang, 1995 (Plecoptera: Perlidae) from Zhejiang Province, southeastern China, pp. 487-493 in Zootaxa 5175 (4) on page 492, DOI: 10.11646/zootaxa.5175.4.6, http://zenodo.org/record/7006513