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. 2022 Apr 10;8(4):385.
doi: 10.3390/jof8040385.

Two New Species of Sidera (Hymenochaetales, Basidiomycota) from Southwest China

Zhan-Bo Liu  1 , Meng Zhou  1 , Fang Wu  1 , Jian Yu  2
Affiliations

Two New Species of Sidera (Hymenochaetales, Basidiomycota) from Southwest China

Zhan-Bo Liu et al. J Fungi (Basel). .

Abstract

Two new wood-inhabiting fungi, Sidera salmonea sp. Nov. and S. tibetica sp. Nov. in the order Hymenochaetales from southwest China, are described and illustrated based on molecular and morphological evidence. They were found on gymnosperm wood that is rotten and charred. The characteristics of S. salmonea include annual, resupinate basidioma, salmon pores with distinctly white margins, angular pores (7-9 per mm), a dimitic hyphal system, and lunate basidiospores that are 3-3.5 × 0.9-1.1 μm. The characteristics of S. tibetica include annual, resupinate basidioma with a white to cream fresh pore surface that becomes cream to honey-yellow and shiny when dry, round pores (7-8 per mm), a dimitic hyphal system, and lunate basidiospores that measure 2.9-3.1 × 1-1.1 μm. A phylogenetic analysis based on the combined 2-locus dataset (5.8S + nuclear large subunit RNA (nLSU)) shows that the two species are members of the genus Sidera, and they are morphologically compared with related species, respectively. This paper provides a key to the identification of 16 accepted species of Sidera that are found throughout the world.

Keywords: Rickenellaceae; phylogenetic analysis; polypore; taxonomy; two new taxa; wood-rotting fungi.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Phylogeny of Sidera and related species generated by ML analyses based on combined 5.8S + nLSU sequences. Branches are labelled with ML bootstrap >70%, parsimony bootstrap proportions >70%, and Bayesian Posterior Probabilities >0.95. New species are indicated in bold. ML, Maximum Likelihood; nLSU, nuclear large subunit RNA.
Figure 2
Figure 2
A basidioma of Sidera salmonea (Paratype, Dai 23354). Scale bar = 1.0 cm. Photo by Yu-Cheng Dai.
Figure 3
Figure 3
Microscopic structures of Sidera salmonea (Holotype, Dai 23612). (a) Basidiospores. (b) Basidia and basidioles. (c) Cystidioles. (d) Hyphae from the subiculum. (e) Hyphae from the trama. (f) Hyphae at the dissepiment edge. Drawings by Zhan-Bo Liu.
Figure 4
Figure 4
A basidioma of Sidera tibetica (Holotype, Dai 23648). Scale bar = 1.0 cm. Photo by Yu-Cheng Dai.
Figure 5
Figure 5
Microscopic structures of Sidera tibetica (Holotype, Dai 23648). (a) Basidiospores. (b) Basidia and basidioles. (c) Cystidioles. (d) Hyphae at the dissepiment edge. (e) Hyphae from the subiculum. (f) Hyphae from the trama. Drawings by Meng Zhou.
See this image and copyright information in PMC

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