Echinocactus arechavaletae Speg. ex Arechav. in Anales Mus. Nac. Montevideo 5: 208. 1905
Echinocactus arechavaletae in Anales Mus. Nac. Montevideo 5: 208. 1905
is later isonym of Echinocactus arechavaletae [as "arechavaletai"] in Anales Mus. Nac. Buenos Aires, ser. 3, 3(4): 496. 1905