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Osmundson, Todd W. & Roy E. Halling. Tylopilus oradivensis sp. nov.: a newly described member of the Tylopilus balloui complex from Costa Rica. Mycotaxon 113: 475–483. 2010.

ABSTRACT: Surveys of macrofungi associated with neotropical Quercus forests in Costa Rica resulted in the discovery of a Tylopilus species similar to T. balloui in appearance but exhibiting differences in typical basidiome size, basidiome coloration, basidiospore size and shape, typical pleurocystidial shape, and DNA sequence characters. Molecular data suggest that T. oradivensis and T. balloui share a relatively recent common ancestor and lend support to the hypothesis of a biogeographic connection between oak forests of the eastern United States and Central America. The orthographic correction of the epithet ballouii to balloui is hereby made in accordance with the International Code of Botanical Nomenclature.

KEYWORDS: Boletaceae, Boletineae, boletes, ectomycorrhizal fungi, Rubinoboletus

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