Ariocarpus elongatus subsp. horacekii (Halda) Halda in Acta Mus. Richnov., Sect. Nat., 5: 36. 1998
Ariocarpus elongatus subsp. horacekii in Acta Mus. Richnov., Sect. Nat., 5: 36. 1998
is new combination for Ariocarpus trigonus var. horacekii in Cactaceae etc. 7: 97. 1997