Stygnocoris Douglas & Scott, 1865: 213. New name for Stygnus Fieber, 1860. Type species by subsequent designation (Oshanin, 1912: 35): Lygaeus rusticus Fallén, 1807.
Stygnus Fieber, 1860b: 49; 1861a: 186 (junior homonym of Stygnus Perty, 1833, Arachnida).
Ophthalmicus (non Schilling, 1829): Stål, 1862b: 214 (partly).
Stethotropis Fieber, 1870: 245 (syn. Douglas & Scott, 1875a: 184). Type species by monotypy: Stethotropis incana Fieber, 1870 (= Lygaeus rusticus Fallén, 1807).