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New North American truffles (Tuber spp.) and their ectomycorrhizal associations Public Deposited

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  • Recent surveys of belowground fungal biodiversity in Mexico and USA have revealed many undescribed truffle species, including many in the genus Tuber. Here we describe seven new species: Tuber beyerlei, T. castilloi, T. guevarai, T. lauryi, T. mexiusanum, T. miquihuanense and T. walkeri. Phylogenetic analyses place these species within the Maculatum group, an understudied clade of small truffles with little apparent economic value. These species are among the more taxonomically challenging in the genus. We collected Tuber castilloi, T. mexiusanum and T. guevarai as fruit bodies and ectomycorrhizae on Quercus spp. in forests of eastern Mexico. Tuber mexiusanum has a particularly broad geographic range, being collected in eastern USA under Populus deltoides and in Minnesota and Iowa in mixed hardwood forests. T. walkeri is described from the upper midwestern USA, and T. lauryi and T. beyerlei occur in the western USA.
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  • Guevara, G., Bonito, G., Trappe, J. M., Cázares, E., Williams, G., Healy, R. A., . . . Vilgalys, R. (2013). New north american truffles (tuber spp.) and their ectomycorrhizal associations. Mycologia, 105(1), 194.
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  • The senior author thanks the DGEST (Direccio´n General de Educacio´n Superior Tecnolo´ gica, SES, ANUIES and CONACyT) for financially supporting this research. Participation by Efren Ca´zares and James Trappe was supported by National Science Foundation award DBI-0098534 and the U.S. Forest Service, Pacific Northwest Research Station. Gregory Bonito, Rytas Vilgalys and Christopher Schadt were supported through the Department of Energy, Office of Biological and Environmental Research, Genome Science Program. Rosanne Healy was supported by the Iowa Science Foundation and the Minnesota Department of Natural Resources.
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