Espostoa melanostele subsp. nana (F.Ritter) G.J.Charles in Cactaceae Syst. Init. 14: 15. 2002 sec. Hunt 2006
- ≡Espostoa nana F.Ritter in Taxon 13(4): 143. 1964 syn. sec. Hunt 2006
- ≡Pseudoespostoa nana (F.Ritter) Backeb., Kakteenlex.: 371. 1966 syn. sec. Hunt 2006