title: Trichomonascus petasosporus sp. nov. and Sympodiomyces indianaensis sp. nov., two new members of the Saccharomycetales.
abstract: Two new yeasts are described that were recognized as novel from nucleotide divergence in domains D1/D2 of 26S rDNA. The new species and their type strains are the following: Trichomonascus petasosporus NRRL YB-2092T (CBS 9602T), mating type a, NRRL YB-2093 (CBS 9603), mating type alpha, and Sympodiomyces indianaensis NRRL YB-1950T (CBS 9600T). Phylogenetic analysis placed the two new taxa, which are sister species, in the Sympodiomyces clade near Blastobotrys/Stephanoascus farinosus. Placement of Trichomonascus in the Saccharomycetales resolves the earlier uncertainties surrounding the classification of this morphologically unusual genus.
authors.affiliation: Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University Street, Peoria, Illinois 61604, USA. Kurtzman@ncaur.usda.gov
authors.forename: Cletus P
authors.initials: CP
authors.lastname: Kurtzman
mesh_terms: D050260:Carbohydrate Metabolism; D004275:DNA, Ribosomal / Q000032:analysis; D016533:Mycological Typing Techniques; D010802:Phylogeny; D004718:Saccharomycetales / Q000145:classification* / Q000166:cytology / Q000235:genetics* / Q000502:physiology
chemical_list: D004275:DNA, Ribosomal