The genus Trichomonascus is morphologically
intermediate between two major groups of ascomycete fungi - the
"higher ascomycetes" (euascomycetes) and the yeasts
(hemiascomycetes). On the basis of gene sequence analyses,
Trichomonascus petasosporus was shown to be a yeast ans
placed within the Saccharomycetales (budding yeasts).
The Trichomonascus petasosporus genome was sequenced as
part of the 1000 Fungal
Genomes Project.