Micranthocereus hofackerianus (P.J.Braun & Esteves) M.Machado in Kakteen And. Sukk. 57(10): 272. 2006 sec. Zappi & Taylor 2020
- ≡Arrojadoa multiflora subsp. hofackeriana P.J.Braun & Esteves in Kakteen And. Sukk. 53: 75. 2002 syn. sec. ???
- ≡Arrojadoa hofackeriana (P.J.Braun & Esteves) P.J.Braun & Esteves in Cact. Succ. J. (Los Angeles) 79: 259. 2007 syn. sec. Zappi & Taylor 2020
- Holotype: Brazil, Bahia, near Piatã, Horst 1394 (UFG)
- Isotype: Brazil, Bahia, near Piatã, Horst 1394 (ZSS)