2019
Gymnocalycium cardenasianum var. pseudocrassispinum Milt 2019
Milt, I. (2019): Gymnocalycium cardenasianum Ritter (historie druhu a popis nového taxonu). - Cactaceae etc. 29(1): p. 25-31.
Holotype: ex coll. Milt nr. 959 (B 172328, Herbarium Regional Museum Olomouk, Tschechien, ho)
Bolivia, ca. 60 km south of Carrizal, on the mountain protrusion above the confluence of the rivers Rio Grande and Rio Higuerita.
Gymnocalycium gaponii subsp. macrocarpum Řepka 2019
Řepka, R. (2019): Eine neue Subspezies von Gymnocalycium gaponii Neuhuber. - Gymnocalycium 32(1): p. 1301-1310.
Type: Argentina: part northwest, Córdoba Province, Ciénaga del Coro town, bank of unpavedroad to Guasapampa, ca. 3,8 km south-west of the town, sandy soil, 1026 m a.s.l.; GPS 41°4'13.225''S, 65°18'15.558''W; coll. Radomír Řepka sub no. RER 492, 22. Januar
Argentina, province Córdoba, Ciénaga del Coro town, bank of unpaved road to Guasapampa, ca. 3.8 km south-west of the town, sandy soil, 1026 m a.s.l. (GPS 41°4'13,225''S, 65°18'15,558''W)
Gymnocalycium hyptiacanthum subsp. callistum Prestlé 2019
Prestlé, K. H.; Till, H.; Amerhauser, H. (2019): Gymnocalycium hyptiacanthum in Uruguay und Rio Grande do Sul - Teil 1. - Gymnocalycium 32(2): p. 1311-1318.
Type: Brasil, Rio Grande do Sul, Departement Quarai, Arroyo Cati, 270 m s.m.; leg. PR 1062, K. H. Prestlé, April 14th 1995 (RB, holo)
Brasil, Border region of Uruguay with Rio Grande do Sul, Departement Quarai, Northern side of Arroyo Cati, 270 m s.m
Gymnocalycium hyptiacanthum subsp. rotundatum Prestlé 2019
Prestlé, K. H.; Till, H.; Amerhauser, H. (2019): Gymnocalycium hyptiacanthum in Uruguay und Rio Grande do Sul - Teil 1. - Gymnocalycium 32(2): p. 1311-1318.
Type: Brasil, Rio Grande do Sul, near Harmonia, 250 m s.m.; leg. K. H. Prestlé PR 933-A; May 12th 1995 (RB, holo)
Brasil, Border region of Uruguay with Rio Grande do Sul, stony grassland near Harmonia, 250 m s.m
Gymnocalycium kuehhasii subsp. corneuspinum Sperling et Strub 2019
Sperling, R.; Strub, T. (2019): New localities concerning the distribution of Gymnocalycium kuehhasii Neuhuber et Sperling. - Schütziana 10(2): 43.
Holotype: Volker Schädlich VoS 10-807 (Herbarium WU 4117) (fig. 19). Cultivated flowering plant grown from seeds collected from the habitat.
Argentina, province Santiago del Estero, east of Villa Ojo de Agua (S29°31.179, W63°38.134, altitude: 375 m. a. s. l.). First discovery 17th January 2010. The plants grow shaded under bushes in grass on stony ground.
Gymnocalycium kuehhasii subsp. incurvatispinum Sperling et Strub 2019
Sperling, R.; Strub, T. (2019): New localities concerning the distribution of Gymnocalycium kuehhasii Neuhuber et Sperling. - Schütziana 10(2): 50.
Holotype: Sperling SPE 142-63-2013 (Herbarium WU 4116). Cultivated flowering plant grown from seeds collected in the habitat, in alcohol.
Argentina, Province Córdoba, southwest of San Francisco del Chañar (S29°55.053, W63°50.502, altitude: 600 m. a. s. l.) First discovery: January 24, 2013. The plants grow in the shade under bushes, in grass on stony ground in the province of Córdoba.
Gymnocalycium x incurvatispinum (Sperling et Strub) Řepka 2019
Řepka, R. (2019): Gymnocalycium kuehhasii und seine Variabilität. - Gymnocalycium 32(4): p. 1333-1344.
Basionym: Gymnocalycium kuehhasii subsp. incurvatispinum Sperling et Strub 2019
Holotype: Sperling SPE 142-63-2013 (Herbarium WU 4116). Cultivated flowering plant grown from seeds collected in the habitat, in alcohol.
Argentina, Province Córdoba, southwest of San Francisco del Chañar (S29°55.053, W63°50.502, altitude: 600 m. a. s. l.).