Gymnocalycium terweemeanum (Teucq ex Duursma) Borgmann & Piltz in Gymnos 13: 47. 1997 Gymnocalycium terweemeanum (Teucq ex Duursma) Borgmann & Piltz in Gymnos 13: 47. 1997is new combination for Echinocactus platensis var. terweemeanus Teucq ex Duursma in Succulenta (Netherlands) 12(7): 137. 1930Taxon for this nameGymnocalycium terweemeanum (Teucq ex Duursma) Borgmann & Piltz