Three yeast strains were isolated from industrial wastes in Thailand. Based on the phylogenetic sequence analysis of the D1/D2 region of the large subunit rRNA gene, the internal transcribed spacer (ITS1-5.8S rRNA gene-ITS2; ITS1-2) region, and their physiological characteristics, the three strains were found to represent two novel species of the ascomycetous anamorphic yeast. Strain JP52(T) represent a novel species which was named Cyberlindnera samutprakarnensis sp. nov. (type strain JP52(T); = BCC 46825(T) = JCM 17816(T) = CBS 12528(T), MycoBank no. MB800879), which was differentiated from the closely related species Cyberlindnera mengyuniae CBS 10845(T) by 2.9 % sequence divergence in the D1/D2 region and 4.4 % sequence divergence in the ITS1-2. Strain JP59(T) and JP60 were identical in their D1/D2 and ITS1-2 regions, which were closely related to those of Scheffersomyces spartinae CBS 6059(T) by 0.9 and 1.0 % sequence divergence, respectively. In addition, supportive evidence of actin gene and translational elongation factor gene by sequence divergence of 6.5 % each confirmed their distinct status. Furthermore, JP59(T) and JP60 differentiated from the closely related species in some biochemical and physiological characteristics. These two strains were assigned as a single novel species which was named Candida thasaenensis sp. nov. (type JP59(T) = BCC 46828(T) = JCM 17817(T) = CBS 12529(T), MycoBank no. MB800880).
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