Abstract
A new distinct genus of Boletales, Zangia, with phenotypic similarities to the genus Tylopilus, is proposed based on molecular and morphological data. The monophyly of Zangia was highly supported using two nuclear and three mitochondrial genes based on Maximum Parsimony, Maximum Likelihood and Bayesian analyses. Morphologically, Zangia is distinguished from other boletoid lineages by its combination of rugose pileus, pinkish to pink hymenophore, pink to pinkish brown spore deposit, pink scabrous squamules on the stipe, chrome yellow to golden yellow stipe base, chrome yellow to golden yellow mycelia on the base of the stipe, ixohyphoepithelium pileipellis, glabrous spores and bluish colour changes in the stipe in some species. Geographically, Zangia is currently only known from southern, southeastern and southwestern China under forests dominated by Fagaceae mixed with Pinaceae. Six species, including 4 new ones and 2 new combinations, are fully documented with taxonomic descriptions and illustrations. A key to the species in Zangia is provided. It is suggested that some of the species might have started diverging from each other relatively recently with the uplifts of the eastern Himalayas and Hengduan Mountains, and both the mycorrhizal host specificity or preference and geographic separation could contribute to their ongoing divergence.
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Acknowledgments
The authors thank Dr. R. H. Petersen (TENN) for providing specimens on loan and granting permission to extract DNA from the type specimens. They are grateful to Dr. Z. W. Ge (HKAS) for providing collections, and to Dr. J. Xu (McMaster University) for polishing the English of the manuscript. Thanks are also due to Dr. R. Kirschner (Department of Life Sciences, National Central University) for improving the Latin. This study was supported by the Joint Funds of the National Natural Science Foundation of China and Yunnan Provincial Government (No. U0836604), the National Basic Research Program of China (No. 2009CB522300), the National Natural Science Foundation of China (No. 31000012), the Hundred Talents Program of the Chinese Academy of Sciences, the Ministry of Science and Technology of China (2008FY110300), the Research Fund for the Large-scale Scientific Facilities of the Chinese Academy of Sciences (2009-LSF-GBOWS-01) and the Knowledge Innovative Program of The Chinese Academy of Sciences (2010KIBB13).
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Li, Y.C., Feng, B. & Yang, Z.L. Zangia, a new genus of Boletaceae supported by molecular and morphological evidence. Fungal Diversity 49, 125–143 (2011). https://doi.org/10.1007/s13225-011-0096-y
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DOI: https://doi.org/10.1007/s13225-011-0096-y