Emendation of Dioszegia with redescriptionof Dioszegia hungarica and two new combinations, Dioszegia aurantiaca and Dioszegia crocea

Masako Takashima, Tibor Deak, Takashi Nakase

Research output: Article

28 Citations (Scopus)

Abstract

During phylogenetic analyses of hymenomycetous yeasts based on 18S rDNA sequences, we found that Bullera armeniaca showed an extremely close phylogenetic relationship to Cryptococcus hungaricus. The analyses of internal transcribed spacer (ITS) regions of the two yeasts and the phylogenetically related species, Bullera aurantiaca and Bullera crocea, showed that B. armeniaca and C. hungaricus had identical sequences, indicating that these were conspecific. B. aurantiaca and B. crocea also showed high sequence similarity, 97.1% for ITS1, 100% for ITS2, and 98.7% for overall ITS regions. A DNA-DNA reassociation experiment revealed that B. armeniaca and C. hungaricus were conspecific and B. aurantiaca and B. crocea were two distinct species. These species occurred at a phylogenetically different lineage from that of Bulleromyces albus (anamorph: Bullera alba, type species of Bullera) and Filobasidiella neoformans (anamorph: Cryptococcus neoformans, neotype species of Cryptococcus). Based on these results, we emend the genus Dioszegia to include both ballistoconidium-forming and non-ballistoconidium-forming yeasts and redescribe the species Dioszegia hungarica. B. aurantiaca and B. crocea are also transferred to Dioszegia as Dioszegia aurantiaca comb. nov. and Dioszegia crocea comb. nov.

Original languageEnglish
Pages (from-to)75-84
Number of pages10
JournalJournal of General and Applied Microbiology
Volume47
Issue number2
DOIs
Publication statusPublished - jan. 1 2001

ASJC Scopus subject areas

  • Microbiology
  • Applied Microbiology and Biotechnology

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