Cantharellaceae of Guyana II: New species of Craterellus, new South American distribution records for Cantharellus guyanensisand Craterellus excelsus, and a key to the Neotropical taxa

Craterellus olivaceoluteussp. nov. and Craterellus cinereofimbriatussp. nov. are described as new to science. These fungi were collected from Guyana in association with ectomycorrhizal host trees in the genera Dicymbe(Fabaceae subfam. Caesalpinioideae) and Pakaraimaea(Dipterocarpaceae). Cantharellus guyanensisMont., originally described from French Guiana, is redescribed from recent collections from Guyana, with additional range extensions for the species provided based on material examined from French Guiana, Venezuela, and north central, northeastern and southern Brazil, circumscribing nearly the entire Guiana Shield region and beyond. A new distribution record from French Guiana is provided for Craterellus excelsusT.W. Henkel & Aime. Macromorphological, micromorphological and habitat data are provided for the new species and C. guyanensisas well as DNA sequence data from the nuclear ribosomal regions of the internal transcribed spacer (ITS) and 28S large subunit (LSU); additional sequence data is provided for C. guyanensisand C. excelsusspecimens collected outside Guyana. The relationships of these taxa within the Cantharellaceae were evaluated with phylogenetic analyses of ITS and LSU sequence data. This work brings the total number of Cantharellaceae species known from Guyana to eight. A key to the Cantharellusand Craterellusspecies known from the lowland Neotropics and extralimital montane Central and South America is provided.