Tremellales » Phaeotremellaceae

Gelidatrema

Gelidatrema Yurkov, Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 113 (2015)

Etymology: In reference to the origin of this psychrophilic yeast and its phylogenetic relatedness to the order Tremellales.

Diagnosis: Basidiocarps not know. Pseudohyphae and true hyphae not observed in culture. Sexual reproduction not observed in culture. Budding cells present. Ballistoconidia absent. Fermentation absent. Nitrate not utilised. Starch-like compounds not produced. Major CoQ system unknown.

Index Fungorum number: IF814759

Type species: Gelidatrema spencermartinsiae (V. de García, Brizzio, Boekhout, Theelen, Libkind & Van Broock) Yurkov, Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 113 (2015)

Notes: Relationships between Cryptococcus spencermartinsiae and Phaeotremella remained unclear in phylogenetic analyses. Cryptococcus spencermartinsiae branched earlier than the foliacea (Phaeotremella) clade, but without bootstrap support in the expanded LSU rRNA gene tree (Figure 1) and with moderate support in the tree inferred from seven genes (Liu et al. 2015a). Additionally, C. spencermartinsiae showed phenotypic characters distinct from other members of the foliacea clade (de García et al. 2010). Thus, Liu et al. (2015b) propose to erect a new genus for this single-species lineage.

Species

Gelidatrema psychrophila M. Tsuji 2018

Gelidatrema spencermartinsiae (V. de García, Brizzio, Boekhout, Theelen, Libkind & Van Broock) Yurkov, Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout 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. 2015a). 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. 2015a) are in red. Note: ns, not supported (BP < 50 %).

 

References:

de García, V., Brizzio, S., Russo, G., Rosa, C. A., Boekhout, T., Theelen, B., ... & van Broock, M. (2010). Cryptococcus spencermartinsiae sp. nov., a basidiomycetous yeast isolated from glacial waters and apple fruits. International journal of systematic and evolutionary microbiology, 60(3), 707-711.

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

 

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