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===''S.eubayanus''===
[[File:Mardones 2020 Fig1C.JPG|thumb|300px|Utilization of maltose by 10 strains of ''S. eubayanus''; higher utilization corresponds with higher ethanol production. Figure 1C from [https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1111/1751-7915.13545 Mardones et al (2020)]. Uploaded with permission from Kristoffer Krogerus.]]
[[File:Mardones 2020 Fig1D.JPG|thumb|300px|Volatile compound production of interest in beer by 10 strains of ''S. eubayanus''. Figure 1D from [https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1111/1751-7915.13545 Mardones et al (2020)]. Uploaded with permission from Kristoffer Krogerus.]]
''S.eubayanus'' is one of the probable parents of lager yeast (''S. pastorianus'') via the hybridisation with ''S. cerevisiae'' <ref name="libkind_2011"></ref><ref name="bing_2014"></ref>.
It was first isolated and described in 2011 growing within ''Nothofagus'' trees in Patagonia, Argentina. Since then, strains of this species have also been found in cold regions across the globe, including Tibet, China, the United States, Chile, and New Zealand. ''S. eubayanus'' has been described as being cold-tolerant, and can grow between 4–25°C. It has been suggested that this trait was inherited by lager yeast.