Neoporteria engleri var. krausii (Backeb.) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 56. 1966
Neoporteria engleri var. krausii in Cact. Succ. J. Gr. Brit. 28: 56. 1966
is new combination for Horridocactus engleri var. krausii, Cactaceae 6: 3796. 1962