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A new genus Pseudoaustroboletus (Boletaceae, Boletales) from Asia as inferred from molecular and morphological data

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Abstract

A new genus of Boletaceae, Pseudoaustroboletus, is described to accommodate the phylogenetically isolated species Tylopilus valens inferred by molecular and morphological data. The lineage consisted of T. valens was nested into the Boletaceae clade with high support value using nuclear genes: the large subunit of the nuclear ribosomal RNA (nrLSU), the translation elongation factor 1-alpha (tef1-α), and mitochondrial gene: the small subunit (mtSSU) of the ribosomal RNA, based on Maximum Likelihood and Bayesian analyses. Morphologically, Pseudoaustroboletus is distinguished from other boletoid lineages by a combination of morphological characters, including the pale pinkish to light pinkish or greyish pink hymenophore, the distinctly reticulated stipe surface, the smooth basidiospores, the brown to dark yellow-brown pigmented cystidia, and the trichodermial brown to dark brown pigmented pileipellis. Geographically, Pseudoaustroboletus is currently only known from China, Japan, Malaysia and Singapore under forests dominated by Fagaceae plants. The species and its variety macrosporus in this genus are fully documented with taxonomic descriptions and illustrations.

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Acknowledgments

The authors thank Drs. David Harris and Adele Smith (E) for providing specimens of P. valens var. valens and P. valens var. macrosporus on loan. The authors are grateful to Dr. Bryn Dentinger for providing information about the type specimen Boletus albellus Massee. This study was supported by the National Natural Science Foundation of China (Nos. 31210103919, 31370001, 31000012), the Natural Science Foundation of Yunnan Province (2013FB066), the Independent Research Program of the Chinese Academy of Sciences (KSCX2-EW-J-24), and the Special Program for Basic Research of the Ministry of Science and Technology, China (2013FY110400).

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Authors and Affiliations

  1. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China

    Yan-Chun Li, Yang Yang Cui & Zhu L. Yang

  2. Sun Yat-Sen University, Guangzhou, 510275, China

    Fang Li

  3. Department of Pharmacy, Hainan Medical University, Haikou, 571101, China

    Nian-Kai Zeng

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  1. Yan-Chun Li
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  2. Fang Li
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  3. Nian-Kai Zeng
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  4. Yang Yang Cui
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  5. Zhu L. Yang
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Correspondence to Zhu L. Yang.

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Li, YC., Li, F., Zeng, NK. et al. A new genus Pseudoaustroboletus (Boletaceae, Boletales) from Asia as inferred from molecular and morphological data. Mycol Progress 13, 1011 (2014). https://doi.org/10.1007/s11557-014-1011-1

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