Neoporteria engleri (F.Ritter) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 56. 1966 Neoporteria engleri (F.Ritter) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 56. 1966is new combination for Horridocactus engleri F.Ritter in Succulenta (Netherlands) 1959: 76. 1959Taxon for this nameNeoporteria engleri (F.Ritter) Donald & G.D.Rowley