Cimex echii Schrank, 1782: 276. ST(S): Austria.
Acanthia echii Wolff, 1804: 130 (syn. Reuter, 1888a: 227). STS: Germany; lost.
Tingis humuli (non Fabricius, 1803): Fallén, 1807: 36. Misidentification (see Fieber, 1844: 46).
Monanthia (Physatocheila) wolffii Fieber, 1844: 86. New name for echii Wolff, preoccupied by echii Fabricius, 1803.
Monanthia echii var. nigricans Hoberlandt, 1943a: 116. HT: male, Czech Republic, Moravia, Hodonin; NMPC.
Monanthia echii var. rufina Seidenstücker, 1954a: 235. LT (Péricart, 1983: 490, as HT): Turkey; ZSMC.