Cryptotrichosporon siamense sp. nov., a ballistoconidium-forming yeast species in Trichosporonales isolated in Thailand Kaewwichian, Rungluk and Khunnamwong, Pannida and Jindamorakot, Sasitorn and Lertwattanasakul, Noppon and Limtong, Savitree,, 68, 2473-2477 (2018), doi = https://doi.org/10.1099/ijsem.0.002858, publicationName = Microbiology Society, issn = 1466-5026, abstract= Two strains, which formed pink colonies and produced ballistoconidia and represented a novel anamorphic yeast species, were isolated from peat (DMKU-SPS1-2) and fern leaf (ST-145) collected in Thailand. Analysis of the sequences of the D1/D2 domains of the large subunit (LSU) rRNA gene and the internal transcribed spacer (ITS) regions showed that the two strains were identical to the sequences of the D1/D2 domains of the LSU rRNA gene and differed by two nucleotide substitutions in the ITS regions. Phylogenetic analysis based on the combined sequences of the ITS and the D1/D2 regions confirmed that the two strains represented a single species in the genus Cryptotrichosporon that was distinct from the other known species of the genus. Cryptotrichosporon argae (CBS 14376T) was the most closely related species, but with 2.2 % nucleotide substitutions in the D1/D2 domains of the LSU rRNA gene, and 6.8–8.0 % nucleotide substitutions in the ITS regions. Therefore, the two strains were assigned as a novel species, for which we propose the name Cryptotrichosporon siamense sp. nov. The type is DMKU-SPS1-2T. The MycoBank number of the novel species is MB82336., language=, type=