Megalonotus Fieber, 1860b: 47; 1861a: 181. Type species by subsequent designation (China, 1941a: 130): Lygaeus chiragra Fabricius, 1794.
Rhyparochromus (non Hahn, 1826): Curtis, 1836: text to pl. 612. Misidentification (see note).
Ktenofer Roubal, 1965b: 556, 572 (as subgenus of Megalonotus; syn. Péricart, 1999c: 125, 126). Type species by original designation: Pachymerus dilatatus Herrich-Schaeffer, 1840.