Hadronotus dubius (Kozlov & Kononova) comb. nov.

Gryon dubium Kozlov & Kononova, 2004: 199 (original description); Kononova & Kozlov, 2008: 322, 333 (description, keyed); Timokhov, 2019a: 19 (distribution); Timokhov, 2019b: 47 (catalog of species of Russia).