Cimex planicornis Pallas, 1772: 23. NT (Kment & Bryja, 2006: 20): male, Netherlands, Utrecht, Amerongen, Zuijlenstein; ZMAN.
Cimex spissicornis Fabricius, 1777: 300 (syn. A. Costa, 1843: 55). ST(S): Germany, Hamburg; lost.
Cimex ater (non Linnaeus, 1758): Geoffroy in Fourcroy, 1785: 211. Misidentification (see Reuter, 1888a: 296, under meriopterum).
?Acanthia crassicornis Fabricius, 1794: 70 (syn. Fabricius, 1803: 246, with spissicornis, suspected). ST(S): Germany; lost.
?Cimex crassipennis Turton, 1802: 609. New name for Acanthia crassicornis Fabricius, 1794 because of secondary homonymy with Cimex crassicornis Linnaeus, 1758.
Heterotoma acinaciformis O. Costa, 1839: 108 (syn. Tamanini, 1981: 58). STS: Italy, Calabria Ulteriore e Citeriore; lost?
Heterotoma merioptera (non Scopoli, 1763): Reuter, 1883e: 336 (in part); Wagner, 1950c: 41; Herczek, 1979: 56, and other authors. Misidentification (see Tamanini, 1962: 136).