Plagiognathus? breviceps Reuter, 1878a: 82. LT (Kerzhner & Popov, 1996: 271): female, Kirgizia, Alai; ZMUM.
Plagiognathus maculosus Zhao, 1996: 352 (also as muculosus; syn. X.M. Li & G.Q. Liu, 2010b: 722). HT: male, China (NW), Gansu, Mt Qilian, Dayekou; NKUM.