1887

Abstract

Two yeast species, sp. nov. and sp. nov., in the family Rhynchogastremataceae of the Tremellales are proposed. The two species are related to six species of the genus : , and . The novel species are proposed on the basis of the sequence-based phylogenetic species concept with analysis of the D1/D2 region of the large subunit (LSU) rRNA gene and the internal transcribed spacer (ITS) region. A total of 16 strains of sp. nov. were obtained from freshwater and bromeliad leaves collected in Brazil. sp. nov. differs by 11, 12, 16, 14, 11 and 13 substitutions in the D1/D2 domain from the related species , and , respectively. Differences of 11 substitutions and 21 or more substitutions in ITS regions were found when the sequences of sp. nov. were compared with and its closest relatives. The type strain of sp. nov. is UFMG-CM-Y374 ( = CBS 13918). sp. nov. is represented by two strains isolated from a flower of sp. and a water sample in Brazil. sp. nov. differs from the related species and by eight substitutions, from and by 11 substitutions, from by 10 substitutions and from by 6 substitutions in the D1/D2 domain, and by 7 substitutions from and more than 19 substitutions in the ITS region from its closest relatives. The type strain of sp. nov. is CBS 8358 (ML 3666 = DBVPG-4492). The MycoBank numbers for sp. nov. and sp. nov. are MB 813594 and MB 814882, respectively.

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2016-04-01
2021-07-28
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