Psallus carduellus Horváth, 1888a: 183. LT (Kerzhner, 1996d: 100): male, Croatia, Dalmatia, Lesina [= Lošinj]; HNHM.
Psallus carduellus var. quadrisignata Reuter, 1904g: 19. ST(S): female, Asian Turkey, Jamanlar da( Mts nr Smyrna [= Izmir]; MZHF.
Psallus carduellus var. infuscata Reuter, 1904g: 19 (junior primary homonym of Psallus proteus var. infuscata Reuter, 1904). HT: female, Asian Turkey, Jamanlar da( Mts nr Smyrna [= Izmir]; MZHF.
Psallus carduellus f. fumigata Stichel, 1958a: 811. New name for var. infuscata Reuter, 1904.