Conostethus griseus Douglas & Scott, 1870 (March): 242. LT (Aukema, 1999: 3): male, Great Britain, Gravesend; BMNH.
Conostethus roseus (non Fallén, 1807): Fieber, 1861a: 394 (part.). Misidentification (see Reuter, 1881a: 182).
Conostethus salinus J. Sahlberg, 1870 (after September 10): 296 (syn. Reuter, 1873: 19; Matocq, 1991: 142). LT (Wagner, 1952m: 7): male, Russia (NT), Karelia, Tschuja [= Shueretskoe]; MZHF.
Lopus subpatellatus Vollenhoven, 1875: 172 (syn. Reuter, 1881a: 182, suspected, and Fokker, 1885: 70, both with salinus). LT (Aukema, 1998: 153): male, Netherlands, 't Schelling [= Terschelling]; RMNH.
Conostethus frisicus Wagner, 1952l: 5 (syn. Southwood & Leston, 1964: 43, with griseus; Matocq, 1991: 142, with salinus). HT: male, Germany, Amrum Is., Norddorf; ZMUH.