Xanthochilus Stål, 1872c: 57 (as subgenus of Pachymerus; upgraded by Kerzhner in Kerzhner & Jaczewski, 1964: 791, 805). Type species by subsequent designation (Oshanin, 1912: 37): Lygaeus quadratus Fabricius, 1798.
Neoxanthochilus Wagner, 1956r: 280 (as subgenus of Rhyparochromus). Unnecessary new name for Xanthochilus (see note).