Wikipedia
Rhodotorula
Rhodotorula is a genus of unicellular pigmented yeasts, part of the division Basidiomycota. It is readily identifiable by distinctive orange/red colonies when grown on SDA ( Sabouraud's Dextrose Agar). This distinctive color is the result of pigments that the yeast creates to block out certain wavelengths of light (620–750 nm) that would otherwise be damaging to the cell.