Titanosiphon benoisti Balachowsky 1933 = Titanosiphon minkiewski Judenko 1931

Both these species have been treated as synonyms of T. artemisiae . The alatae of T. benoisti are described as having 4 rhinaria on antennal segment IV, indicating synonymy with minkiewski (0–7 rhinaria on IV), rather than artemisiae (without rhinaria on IV).