Titanopsis schwantesii (Dinter ex Schwantes) Schwantes in Z. Sukkulentenk. 2: 17. 1926 sec. Hartmann 2017
- ≡Mesembryanthemum schwantesii Dinter ex Schwantes in Monatsschr. Kakteenk. 26: 82. 1916 syn. sec. Hartmann 2017
- ≡Verrucifera schwantesii (Dinter ex Schwantes) N.E.Br. in Gard. Chron., ser. 3, 88: 513. 1930 syn. sec. Hartmann 2017
- =Mesembryanthemum calcareum Dinter, Neue Pfl. Deutsch-Sudwest-Afr.: 38. 1914, nom. illeg., syn. sec. Hartmann 2017
- =Mesembryanthemum concinnum N.E.Br. in Gard. Chron., ser. 3, 60: 204. 1916 syn. sec. Hartmann 2017
- =Titanopsis luederitzii Tischer in Succulenta (Netherlands) 11: 156. 1927 syn. sec. Hartmann 2017
- ≡Verrucifera luederitzii (Tischer) N.E.Br. in Gard. Chron., ser. 3, 88: 513. 1930 syn. sec. Hartmann 2017
- =Titanopsis primosii L.Bolus ex S.A.Hammer, Mesembs: 143. 2013 syn. sec. Hartmann 2017