Echinocactus capricornis var. niveus K.Kayser in Kakteenkunde 1933: 32. 1933
Echinocactus capricornis var. niveus in Kakteenkunde 1933: 32. 1933
is basionym for Astrophytum niveum in Kakteen And. Sukk. 8: 137. 1957
is basionym for Astrophytum niveum in Kakteen And. Sukk. 9: 81. 1958