galactomyces reessii galactomyces reessii galactomyces reessii is a yeast belonging to the genus galactomyces. galactomyces reessii scientific classification kingdom: fungi division: ascomycota class: saccharomycetes order: saccharomycetales family: dipodascaceae genus: galactomyces species: g. reessii binomial name galactomyces reessii(van der walt) redhead & malloch it contains an enzyme that converts 3-methylcrotonic acid to 3-hydroxy-3-methylbutyric acid aka β-hydroxy β-methylbutyric acid. it can also have an enzyme that dissolves pectin. galactomyces reessii lives naturally in soil and on decaying vegetable matter. galactomyces reessii does not consume d-mannitol. it cannot ferment glucose.