Gymnocalycium volskyi subsp. angulatum (Prestlé) V.Gapon, Chikin, Ponomareva, Protopopov, B. & Schelkun. in Kaktus-Klub, n.
Gymnocalycium volskyi subsp. angulatum in Kaktus-Klub, n.s. 4(2): 28. 2020
is new combination for Gymnocalycium denudatum subsp. angulatum in Gymnocalycium 17: 573. 2004