Cereus phatnospermus K.Schum. in Monatsschr. Kakteenk. 9: 186. 1899 sec. Hunt 2016
- ≡Monvillea phatnosperma (K.Schum.) Britton & Rose, Cactaceae 2: 24. 1920 syn. sec. Kew WCVP (2019)
- =Monvillea kroenleinii R.Kiesling in Cact. Succ. J. (Los Angeles) 66(4): 159. 1994 syn. sec. TROPICOS 1988+
- ≡Cereus kroeneinii (R.Kiesling) P.J.Braun & Esteves in Succulenta (Netherlands) 74(2): 84. 1995 syn. sec. Hunt 2016
- ≡Monvillea phatnosperma subsp. kroenleinii (N.P.Taylor) Lodé in Cact.-Avent. Int. 98(Suppl.): 6. 2013 syn. sec. Kew WCVP (2019)
- =Cereus kroenleinii N.P.Taylor in Kew Bull. 50: 819. 1995 syn. sec. Hunt 2016
- ≡Cereus phatnospermus subsp. kroenleinii (N.P.Taylor) P.J.Braun & Esteves in Kakteen And. Sukk. 48: 142. 1997 syn. sec. Kew WCVP (2019)
- =Monvillea phatnosperma var. arenasii Oakley & R.Kiesling in Bol. Soc. Argent. Bot. 50: 251. 2015 syn. sec. Kew WCVP (2019)
