Cystofilobasidiales » Mrakiaceae


Krasilnikovozyma X.Z. Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 113 (2015)

Etymology: The genus is named in honour of the Russian microbiologist N. A. Krasil'nikov for his contribution to the ecology and systematics of yeasts.

Diagnosis: Basidiocarps absent. Pseudohyphae and true hyphae occasionally produced. Sexual reproduction observed in some species. Teliospores with pseudoclamps terminal produced; teliospores germination by formation of holometabasidia or hyphal structures. Budding cells present. Chlamydospores may be present. Fermentation absent. d-glucose, d-galactose, cellobiose, lactose, d-xylose, and citric acid are usually utilised. Glycerol and low-weight aromatic compounds are not utilised. Nitrate and nitrite usually utilised. Starch-like compounds can be produced. Major CoQ system CoQ-8

Index Fungorum number: IF812178

Type species: Krasilnikovozyma huempii (C. Ramírez & A. E. González) X.Z. Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 113 (2015)

Notes: Mrakia curviuscula was considered to be the teleomorph of C. huempii based on similar physiological and biochemical characters (Bab'eva et al. 2002) and identical D1/D2 LSU rRNA gene sequences (Boekhout et al., 2011a, Weiss et al., 2014). Liu et al. (2015a) showed that they also exhibited similar protein-coding gene sequences, confirming their conspecificity. Cryptococcus tahquamenonensis was recently described as a close relative of Mrakia curviuscula and Cryptococcus huempii (Sylvester et al. 2015). This relationship was confirmed in this study by the ML analysis of the D1/D2 sequence dataset. Thus, C. tahquamenonensis was transferred here to Krasilnikovozyma. Phenotypically, the species in Krasilnikovozyma can grow at 25 °C and thus differ from the species of the genus Mrakia, which are psychrophilic with a maximum growth temperature below 20 °C (Fell 2011). Krasilnikovozyma currently contains two species and two additional sequences representing potential new species were obtained from public databases.



Krasilnikovozyma curviuscula (Babeva, Lisichk., Reshetova & Danilev.) Yurkov, Kachalkin & J.P. Samp. 2019

Krasilnikovozyma fibulata Glushakova & Kachalkin 2019

Krasilnikovozyma huempii (C. Ramírez & A.E. González) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout 2015

Krasilnikovozyma tahquamenonensis Yurkov 2015

Figure 1. Phylogenetic relationships of yeasts and related taxa from the order Cystofilobasidiales in Tremellomycetes obtained by maximum-likelihood analysis of LSU (D1/D2 domains) rRNA gene. Tree topology was backbone-constrained with the well-supported (>85 %) bipartitions of the topology of the seven-genes tree. Bootstrap percentages (BP) of maximum likelihood and neighbour-joining analyses from 1 000 replicates are shown respectively from left to right on the deep and major branches resolved and in brackets following recognised clades. The type species of accepted genera are in bold and the taxa not included in the seven-genes dataset are in red. Note: ns, not supported (BP < 50 %).



Bab'eva, I. P., Lisichkina, G. A., Reshetova, I. S., & Danilevich, V. N. (2002). Mrakia curviuscula sp. nov.: a new psychrophilic yeast from forest substrates. Microbiology, 71(4), 449-454.

Boekhout, T., Fonseca, A., Sampaio, J. P., Bandoni, R. J., Fell, J. W., & Kwon-Chung, K. J. (2011). Discussion of teleomorphic and anamorphic basidiomycetous yeasts. In The Yeasts (pp. 1339-1372). Elsevier.

Fell, J. W., & Statzell-Tallman, A. (1998). Mrakia Y. Yamada & Komagata. The Yeasts, a Taxonomic Study, 676-677.

Liu, X. Z., Wang, Q. M., Theelen, B., Groenewald, M., Bai, F. Y., & Boekhout, T. (2015a). Phylogeny of tremellomycetous yeasts and related dimorphic and filamentous basidiomycetes reconstructed from multiple gene sequence analyses. Studies in mycology, 81, 1-26.

Liu, X. Z; Wang, Q. M; Göker, M; Groenewald, M; Kachalkin, A.V; Lumbsch, H.T; Millanes, A.M; Wedin, M; Yurkov,A.M; Boekhout,T; Bai, F.-Y. (2015b). Towards an integrated phylogenetic classification of the Tremellomycetes. Studies in Mycology. 81:85-147

Sylvester, K., Wang, Q. M., James, B., Mendez, R., Hulfachor, A. B., & Hittinger, C. T. (2015). Temperature and host preferences drive the diversification of Saccharomyces and other yeasts: a survey and the discovery of eight new yeast species. FEMS yeast research, 15(3), fov002.

Weiss, M., Bauer, R., Sampaio, J. P., & Oberwinkler, F. (2014). 12 Tremellomycetes and Related Groups. In Systematics and Evolution (pp. 331-355). Springer, Berlin, Heidelberg.


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


Supported by 

Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)


  • Email:
  • Addresses:
    Mushroom Research Foundation, 292 Moo 18, Bandu District,
    Muang Chiangrai 57100, Thailand
  • The State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.3 1st Beichen West Rd., Chaoyang District, Beijing 100101, P.R. China

Published by the State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences and
Mushroom Research Foundation
Copyright © The copyright belongs to the Curators. All Rights Reserved.