Pachymerus staphyliniformis Schilling, 1829: 77. ST(S): Poland, Silesia; lost.
Pachymerus staphylinoides Burmeister, 1835: 294. Unjustified emendation.
Plociomerus brachypterus Boheman, 1852a: 105 (syn. Baerensprung, 1858b: 80). STS: Sweden (south); NHRS?