Parodia tenuicylindrica (F.Ritter) D.R.Hunt in Cactaceae Consensus Init. 4: 6. 1997 sec. Zappi & Taylor 2020
- ≡Notocactus tenuicylindricus F.Ritter in Succulenta (Netherlands) 49: 108. 1970 syn. sec. Anceschi & Magli 2018
- ≡Notocactus minimus var. tenuicylindricus (F.Ritter) Havlíček in Repert. Pl. Succ. 41: 11. 1990 syn. sec. Kew WCVP (2019)
- =Notocactus minimus Frič & Kreuz. ex Buining in Succulenta (Netherlands) 22: 86. 1940 syn. sec. Anceschi & Magli 2018
- ≡Peronocactus minimus (Frič & Kreuz. ex Buining) Doweld in Sukkulenty 2(2): 21. 1999 syn. sec. Anceschi & Magli 2018