North American Fungi Volume 5, Number 4, Pages 1-10 Published November 19, 2010 Aurantiopileus mayanensis a new genus and species of polypore (Polyporales, Basidiomycota) from Belize with connections to existing Asian species James Ginns 1 , Daniel L. Lindner 2 , Timothy J. Baroni 3 , Leif Ryvarden 4 1 1970 Sutherland Road, Penticton, BC V2A 8T8 Canada, 2 US Forest Service, Northern Research Station, Center for Forest Mycology Research, One Gifford Pinchot Dr., Madison, WI 53726-2398 USA, 3 Department of Biological Sciences, P. O. Box 2000, State University of New York, College at Cortland, Cortland, NY 13045 USA, 4 Department of Botany, University of Oslo, P. O. Box 1066, Blindern, NO-0316 Norway Ginns, J., D. L. Lindner, T. J. Baroni, and L. Ryvarden. 2010. Aurantiopileus mayanensis a new genus and species of polypore (Polyporales, Basidiomycota) from Belize with connections to existing Asian species. North American Fungi 5(4): 1-10. doi: 10.2509/naf2010.005.004 Corresponding author: Timothy J. Baroni tim.baroni@cortland.edu . Accepted for publication September 17, 2010. http://pnwfungi.org Copyright ｩ 2010 Pacific Northwest Fungi Project. All rights reserved. Abstract: A new genus and species of polypore, Aurantiopileus mayanensis, is described from Central America based on a visually striking collection made in the cloud forests of the Maya Mountains in Belize. Phylogenetic analysis using nLSU sequences and distinctive morphological characters support the erection of a new genus to accommodate this species. Two Asian species formerly placed in Gloeoporus are also considered to be members of this new genus and the new combinations are provided, along with a key to the three taxa now placed in Aurantiopileus. Key words: Aurantiopileus mayanensis, Gloeoporus, Phlebia, brightly colored polypores, key to species of Aurantiopileus, Doyle’s Delight, Maya Mountains.