Pachymerus praetextatus Herrich-Schaeffer, 1835b: 45, 79. ST(S): Spain; lost.
Rhyparochromus maculipennis Curtis, 1836: text to pl. 612 (syn. Amyot, 1846b: 93). STS: Great Britain, Mousehold Heath nr Norwich and Thetford Warren; MVMA.
Pachymerus femoralis Boheman, 1851: 249 (syn. Baerensprung, 1858b: 80). HT: female, Sweden, Gotland, Westerby; lost?
Rhyparochromus praetextatus var. obscuratus Noualhier, 1893: 10. ST(S): Canary Islands, Gran Canaria, Tafira; lost?
Megalonotus praetextatus ibericus Wagner, 1955x: 120 (syn. Péricart, 1999c: 157). HT: male, France, Paris basin, Lardy; ZMUH. #Megalonotus praetextus auct. Lapsus.