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The Generic Circumscription of Mrakia and Related Taxa (Psychrophilic Yeasts)

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  • Yuzo Yamada Department of Agricultural Chemistry, Faculty of Agriculture, Shizuoka University
  • Huong Thi Lan Vu Department of Microbiology, Faculty of Biology and Biotechnology, University of Science, Vietnam National University-HCM City
  • Pattaraporn Yukphan BIOTEC Culture Collection (BCC), National Center for Genetic Engineering and Biotechnology (BIOTEC)
  • Somboon Tanasupawat Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University

DOI:

https://doi.org/10.51094/jxiv.231

Keywords:

Mrakia, Mrakia frigida, Mrakiella, Mrakiella cryoconiti, Krasilnikovozyma curviuscula comb. nov.

Abstract

In the family Mrakiaceae, the type genus Mrakia senseu stricto included five teleomorphic species with the type species,Mrakia frigida. In contrast, the anamorphic genus Mrakiella sensu stricto did 11 species with the type species, Mrakiella cryoconiti. Between the two genera, the completely separated clusters were shown in the phylogenetic tree (LSU D1/D2) derived from the maximum parsimony method. The pair-wise sequence similarity between Mrakia frigida and Mrakiellacryoconiti and Mrakiella aquatica were 98.2% and 96.8% respectively. The calculated pair-wise sequence similarities were 100-99.3% among the five Mrakia species and were 97.1% between Mrakiella cryoconiti and Mrakiella aquatica. The teleomorphic genus Krasilnikovozyma emend. contained three species with the type species, Krasilnikovozyma curviuscula. Thus, the two teleomorphic genera were taxonomic homogeneous-natured, and the three were characteristic of Q-8.   

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Submitted: 2022-12-21 10:22:24 UTC

Published: 2022-12-23 08:05:41 UTC — Updated on 2023-01-04 06:13:32 UTC

Versions

Reason(s) for revision

To validate the new combinations, i.e., to obtain MycoBank numbers, the descriptions of the basionyms have to be revised. In ver 3, the new manucipt has been also improved.
Section
Biology, Life Sciences & Basic Medicine

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Copyright (c) 2022 Yuzo Yamada
Huong Thi Lan Vu
Pattaraporn Yukphan
Somboon Tanasupawat

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