Plagiognathus (Plagiognathus) miyamotoi Kerzhner, 1988d (March): 855; 1988b (April): 64. LT (Kerzhner, 1988b: 65, as HT): male, Russia (FE), Kunashir Is., Kosmodem'yansk; ZMAS.
Plagiognathus lividus (non Reuter, 1906): Miyamoto, 1969b: 90; Kerzhner, 1979a: 54 (part.). Misidentification (see Kerzhner, 1988b: 64).