Protantigius is a monotypic butterfly genus in the family Lycaenidae. "Protantigius Shirôzu & Yamamoto, 1956" at Markku Savela's Lepidoptera and Some Other Life Forms Its single species is Protantigius superans found in the Russian Far East (Primorye), north-eastern and central China and on the Korean Peninsula.
The habitat consists of gaps, stream bottomlands and edges of deciduous forests.
Adults are on wing from mid-July to mid-August.
The larvae possibly feed on Fraxinus rhynchophylla, Alunus hirsuta, Populus koreana and/or Salix species.
Subspecies Protantigius superans superans Protantigius superans ginzii (Seok, 1936) (southern Primorye, Korea)
References
Protantigius superans (Oberthur, 1914) at Insecta.pro