Cephalocereus Pfeiff. in Allg. Gartenzeitung 6: 142. 1838 sec. Hunt & al. 2006
- =Cephalophorus Lem., Cact. aliq. nov.: XII. 1838 syn. sec. Hunt & al. 2006
- =Pilocereus Lem., Cact. Gen. Sp. Nov.: 6. 1839 syn. sec. Hunt & al. 2006
- =Neobuxbaumia Backeb. in Blätt. Kakteenf. 1938-6: sine pag. 1938 syn. sec. Tapia & al. 2017
- =Haseltonia Backeb. in Blätt. Sukkulentenk. 1: 3. 1949 syn. sec. Hunt & al. 2006
- =Neodawsonia Backeb. in Blätt. Sukkulentenk. 1: 4. 1949 syn. sec. Hunt & al. 2006
- =Carnegiea subg. Rooksbya Backeb. in Cact. Succ. J. (Los Angeles) 22: 154. 1950 syn. sec. Tapia & al. 2017
- =Rooksbya (Backeb.) Backeb., Cactaceae (Backeberg) 4: 2165. 1960 syn. sec. Tapia & al. 2017