As classified in WFO snapshot
May 2019
Warning: older classification
subspecies
Gymnocalycium marsoneri subsp. megatae
This subspecies name was first published in Gymnocalycium Habitat Culture: 241. 2009.
At the time of this classification snapshot, this subspecies name was accepted by WFO (placed as the accepted name of a taxon). Its description and other taxonomic data can be found on World Flora Online, id: wfo-0000744004.