Schizosaccharomycetes

Schizosaccharomycetes is a class in the kingdom of fungi. It contains the order Schizosaccharomycetales, the fission yeasts. The genus Schizosaccharomycetes is a broad and ancient clade within the Ascomycete fungi including four known fission yeast: 
Schizosaccharomyces pombe, Schizosaccharomyces japonicius, Schizosaccharomyces octosporus, and Schizosaccharomyces crophilus.