Two new species of Phylloporus from Bangladesh, with morphological and molecular evidence

ABSTRACT

Two new species of Phylloporus from Bangladesh forests dominated by Shorea robusta are described and illustrated, based on morphological and molecular phylogenetic evidence. Phylloporus attenuatus is characterized by its wine-red to brownish-red pilei, decurrent lamellae that stain blue, downwards tapering stipe, a trichodermium pileipellis, and ellipsoidal-ovoid to ellipsoidal basidiospores (7–8 × 4–5 µm). Phylloporus catenulatus is characterized by its small-sized basidiomata with reddish-brown pilei, narrowly decurrent with distant lamellae that stain blue, a subepithelium pileipellis, and ellipsoidal to ellipsoidal-ovoid basidiospores (8–9.5 × 4–5 µm). Both new species of Phylloporus are distinctive from any known taxa based on phylogenetic analyses of partial sequences of the nuc rDNA internal transcribed spacer (ITS; including ITS1-ITS2 but not 5.8S) region, partial sequence of nuclear ribosomal large subunit (28S) domains D1 and D2, and translation elongation factor 1-α (TEF1α). Both species are compared with phenotypically similar taxa and illustrated with line drawings and photographs. A key to the species of Phylloporus known from Bangladesh is provided.

KEYWORDS:

• Basidiomycota
• Boletaceae
• Dipterocarpaceae
• Molecular phylogeny
• South Asian boletes

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Acknowledgments

Prof. Dr. Zhu L. Yang (China) is acknowledged for his kind help and suggestions on an earlier version of the manuscript. The authors are grateful to Dr. Teresa Lebel (Australia) for her suggestions and linguistic help on the manuscript. The authors are thankful to Dr. Nian-Kai Zeng (China) and Dr. Xue-Tai Zhu (China) for sharing their sequences of Phylloporus and Hourangia, respectively.

FUNDING

This study was supported by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (no. 31210103919), the Natural Science Foundation of Guangdong Province (no. S2013010015544), and the National Natural Science Foundation of China (no. 31370072).

Additional information

Funding

This study was supported by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (no. 31210103919), the Natural Science Foundation of Guangdong Province (no. S2013010015544), and the National Natural Science Foundation of China (no. 31370072).