Saccharomyces uvarum

Saccharomyces uvarum is a species of yeast that is commonly found in fermented beverages, particularly those fermented at colder temperatures.^[1] It was originally described by Martinus Willem Beijerinck in 1898, but was long considered identical to S. bayanus.^[1][2] In 2000 and 2005, genetic investigations of various Saccharomyces species indicated that S. uvarum is genetically distinct from S. bayanus and should be considered a unique species.^[1][2]

Saccharomyces uvarum
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Saccharomycetes
Order:	Saccharomycetales
Family:	Saccharomycetaceae
Genus:	Saccharomyces
Species:	S. uvarum
Binomial name
Saccharomyces uvarum Nguyen & Gaillardin ex. Beijerinck
Synonyms
Saccaromyces bayanus var uvarum

It is a bottom-fermenting yeast, so-called because it does not form the foam on top of the wort that top-fermenting yeast does.