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Abstract
Seven previously undescribed diaporthalean species were found in eastern Asia and eastern North America. Three of these new species and one previously known species are assigned to a new genus Leucodiaporthe. Descriptions and illustrations are provided for the new taxa including Allantoporthe leucothöes sp. nov., Diaporthella corylina sp. nov., Leucodiaporthe acerina sp. nov., L. juglandis sp. nov., L. maackii comb. nov., L. robiniae sp. nov., Leucostoma pseudoniveum sp. nov., Leucostoma excipienda comb. nov., and Phragmodiaporthe padi sp. nov.
We thank Aleksey Chernyshev (Institute of Marine Biology) for his help with the preparation of illustrations and Christian Feuillet (Smithsonian Institution) for translating the diagnoses into Latin. The first author acknowledges the Discover Life in America program (DLIA 2006-4) for opportunities to travel to the United States and collect fungi in the Great Smoky Mountains National Park. This research was conducted as part of a project financially supported by the National Science Foundation PEET (NSF 03-28364).