Echinofossulocactus robustus (Otto ex Pfeiff.) Lawr. in Gard. Mag. (London) 17: 318. 1841 Echinofossulocactus robustus (Otto ex Pfeiff.) Lawr. in Gard. Mag. (London) 17: 318. 1841is new combination for Echinocactus robustus Otto ex Pfeiff., Enum. Diagn. Cact.: 61. 1837Taxon for this nameEchinofossulocactus robustus (Otto ex Pfeiff.) Lawr.