Gibbaeum schwantesii Tischer in Kakteen And. Sukk. 1: 152. 1937 sec. Thiede 2017
- ≡Mentocalyx muirii N.E.Br. in Gard. Chron., ser. 3, 81: 252. 1927 syn. sec. Thiede 2017
- ≡Gibbaeum muirii Schwantes ex H.Jacobsen, Succ. Pl.: 180. 1935, nom. illeg., syn. sec. Thiede 2017