Tremellales » Bulleraceae


Fonsecazyma Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 119 (2015)

Etymology: The genus is named in honour of the Portuguese mycologist Álvaro Fonseca, for his contributions to the study of diversity and systematics of basidiomycetous yeasts.

Diagnosis: Basidiocarps unknown. Sexual reproduction has not been observed. Pseudohyphae and true hyphae have not been observed. Budding cells present. Ballistoconidia are not formed. Fermentation is absent. Nitrate is not utilised. Major CoQ system is CoQ-10.

Index Fungorum number: IF813136

Type species: Fonsecazyma mujuensis (K.S. Shin & Y.H. Park) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 119 (2015)

Notes: The phylogenetic analysis of the seven-gene dataset in Liu et al. (2015a) indicated that Cryptococcus mujuensis was closely related to Sirobasidium intermedium. Cryptococcus tronadorensis was originally described as a new species related to the Kwoniella clade based on the LSU rRNA gene sequences similarity in de Garcia et al. (2012). Similarly, the recently described Kwoniella betulae (Sylvester et al. 2015) was also placed in this clade. Unfortunately, Cr. mujuensis was not employed in these studies. In the tree obtained from the expanded LSU rRNA gene dataset, Cr. mujuensis, Cr. tronadorensis and K. betulae formed a strongly supported clade, which was only distantly related to the Kwoniella and the S. intermedium clades. Thus, the new genus Fonsecazyma was proposed to accommodate these three species.


Fonsecazyma betulae Yurkov, Kachalkin & Boekhout 2015

Fonsecazyma mujuensis (K.S. Shin & Y.H. Park) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout 2015

Fonsecazyma tronadorensis Yurkov 2015


Figure 1. Phylogenetic relationships of yeasts and related taxa from the order Tremellales 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 (Liu et al. 2015). 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 (Liu et al. 2015) are in red. Note: ns, not supported (BP < 50 %).


De Garcia, V., Zalar, P., Brizzio, S., Gunde-Cimerman, N., & Van Broock, M. (2012). Cryptococcus species (Tremellales) from glacial biomes in the southern (Patagonia) and northern (Svalbard) hemispheres. FEMS microbiology ecology, 82(2), 523-539.

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).


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)


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