Thelocactus rinconensis var. freudenbergeri R.Haas in Kakteen And. Sukk. 43(5): 97. 1992
Thelocactus rinconensis var. freudenbergeri in Kakteen And. Sukk. 43(5): 97. 1992
is basionym for Thelocactus rinconensis subsp. freudenbergeri in Cactaceae Consensus Init. 7: 18. 1999
is basionym for Thelocactus lophothele subsp. freudenbergeri, Thelocactus: 184. 2011