The genus Heimioporus in China

ABSTRACT

Species of Heimioporus (Boletaceae, Boletales) in China are investigated on the basis of morphology and molecular phylogenetic analyses of DNA sequences from the nuc rDNA internal transcribed spacer ITS1-5.8S-ITS2 region and nuc 28S rDNA D1–D2 domains (28S) and translation elongation factor 1-α gene (TEF1). Three species are recognized in China: H. conicus, sp. nov., H. gaojiaocong, sp. nov., and the previously described H. japonicus. Heimioporus xerampelinus, originally described from southwestern China, is synonymized with H. japonicus; specimens from China previously regarded as H. retisporus and H. subretisporus are confirmed to represent H. japonicus and H. gaojiaocong, respectively. A key to the Chinese taxa of the genus is provided. A preliminary biogeographical analysis shows that Heimioporus in East Asia and Southeast Asia/Australia are closely related. Heimioporus japonicus is a geographically widespread species occurring in East Asia and Southeast Asia; however, no taxa common to East Asia and Australia were uncovered.

KEYWORDS:

• Boletes
• revision
• systematics
• taxonomy
• 2 new taxa

ACKNOWLEDGMENTS

N.-K.Z. thanks the following colleagues: Dr. W. Z. Ma, Kunming Institute of Botany (KIB), Chinese Academy of Sciences, for allowing access to the herbarium to examine the collections of Heimioporus; Dr. Y. J. Hao, Anhui Agricultural University, for providing one collection of Heimioporus japonicus and improving the manuscript; and Mr. Z. J. Gu and Dr. Z. X. Ren (KIB) for helping to use the SEM facility.

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Funding

This study was supported by the National Natural Science Foundation of China (grant nos. 31210103919, 31560005, 31360008, and 31760008).