Inopinatum lactosum gen. & comb. nov., the first yeast-like fungus in Leotiomycetes

Danny Haelewaters*, Robyn A. Peterson, Helena Nevalainen, M. Catherine Aime*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Sporobolomyces lactosus is a pink yeast-like fungus that is not congeneric with other members of Sporobolomyces (Basidiomy-cota, Microbotryomycetes, Sporidiobolales). During our ongoing studies of pink yeasts we determined that S. lactosus was most closely related to Pseudeurotium zonatum (Ascomycota, Leotiomycetes, Thelebolales). A molecular phylogenetic analysis using sequences of the ITS region and the small and large subunit (SSU, LSU) rRNA genes, indicated that four isolates of S. lactosus, including three ex-type isolates, were placed in Thelebolales with maximum support. A new genus is proposed to accommodate S. lactosus, Inopinatum. This is the first pink yeast reported in Leotiomycetes.

Original languageEnglish
Article number004862
Pages (from-to)1-7
Number of pages7
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number7
Publication statusPublished - 2021


  • Ascomycetous yeast
  • Pink yeast
  • Sporobolomyces lactosus
  • Taxonomy


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