Echinocactus nidulans Quehl in Monatsschr. Kakteenk. 21: 119. 1911
Echinocactus nidulans in Monatsschr. Kakteenk. 21: 119. 1911
is basionym for Thelocactus rinconensis subsp. nidulans, Guía Identif. Cact. Amenazadas México 1: TH/RIN. 1997
is basionym for Thelocactus lophothele subsp. nidulans, Thelocactus: 180. 2011
is basionym for Thelocactus rinconensis var. nidulans in Cact. Succ. J. (Los Angeles) 49: 245. 1977
is basionym for Thelocactus lophothele var. nidulans in Krainz, Kakteen 61: CVIIIb. 1975
is basionym for Thelocactus nidulans, Cactaceae 4: 9, f. 8. 1923