Echinofossulocactus acroacanthus (Stieber) G.D.Rowley in Repert. Pl. Succ. 23: 7. 1974 ["1972"]
Echinofossulocactus acroacanthus in Repert. Pl. Succ. 23: 7. 1974 ["1972"]
is new combination for Echinocactus acroacanthus in Bot. Zeitung (Berlin) 5: 491. 1847