Yeasts from frass of longhorn beetle larvae (Cerambycidae) in birch wood and description of Diddensiella monakovoensis f.a., sp. nov

In the study of yeasts from frass of longhorn beetle larvae, species with high abundance from the genera Diddensiella, Scheffersomyces and Sugiyamaella and some others with lower abundance were observed. The novel ascomycetous yeast species Diddensiella monakovoensis f.a., sp. nov. (holotype: KBP Y-6906; isotypes: VKM Y-3676 and DBVPG 8067) is proposed based on a conventional DNA-barcode sequence analysis and physiological characteristics. The new yeast species differs by 3.5% (11 nt substitutions and 7 indels) in the internal transcribed spacer (ITS region) of the rDNA sequence from the type strain D. caesifluorescens NCAIM Y.01949 ^T and has about 2% (11 nt substitutions) and 9% (76 nt substitutions and 4 indels) differences from it by sequences of the partial large-subunit (LSU) region and translation elongation factor 1-alpha (TEF1-α) gene, respectively. The genetic differences between the species are also underpinned by different physiology.