Tremellales » Bulleraceae

Pseudotremella

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

Etymology: In reference to the tremella-like basidiocarp and basidium morphology.

Diagnosis: Basidiocarps pustulate, erumpent or tuberculate on wood, pulvinate, hemispherical-moriform to cerebriform, white to pinkish or cream, amber to dark reddish-brown, drying brownish to black. Dikaryotic hyphae hyaline to brown or reddish, with clamp connections and occasionally haustorial branches. Basidia globose, ellipsoidal, obovoid, pyriform or capitate; four-celled with longitudinal to oblique septa. Budding cells sometimes present. Poorly developed pseudohyphae sometimes present. Fermentation absent. Nitrate not utilised. Major CoQ system unknown.

Index Fungorum number: IF813334

Type species: Pseudotremella moriformis (Sm. & Sowerby) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout, in Liu et al., Studies in Mycology 81: 113 (2015)

Notes: In the tree obtained from the seven-genes dataset, Tremella moriformis and Cryptococcus allantoinivorans clustered together with strong BP and PP support values, though they were regarded as representing single-species lineages (Liu et al. 2015a). In the tree from the expanded LSU rRNA gene dataset (Fig. 5B), the Tremella species in the moriformis clade recognised in Chen (1998) and Cryptococcus allantoinivorans formed a monophyletic clade together with a recently described species, Cryptococcus lacticolor (Satoh et al. 2013). Thus, Liu et al. (2015b) propose the genus Pseudotremella to accommodate this clade.

 

Species

Pseudotremella allantoinivorans (Middelhoven) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout 2015

Pseudotremella lacticolor Satoh & Makimura ex Yurkov 2020

Pseudotremella moriformis (Sm. & Sowerby) Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout 2015

Pseudotremella nivalis (Chee J. Chen) 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:

Chen, C. J. (1998). Morphological and molecular studies in the genus Tremella.

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

Satoh, K., Maeda, M., Umeda, Y., Sugamata, M., & Makimura, K. (2013). Cryptococcus lacticolor sp. nov. and Rhodotorula oligophaga sp. nov., novel yeasts isolated from the nasal smear microbiota of Queensland koalas kept in Japanese zoological parks. Antonie Van Leeuwenhoek, 104(1), 83-93.

 

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