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

Abstract

Craterellus olivaceoluteus sp. nov. and Craterellus cinereofimbriatus sp. 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 guyanensis Mont., 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 excelsus T.W. Henkel & Aime. Macromorphological, micromorphological and habitat data are provided for the new species and C. guyanensis as 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. guyanensis and C. excelsus specimens 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 Cantharellus and Craterellus species known from the lowland Neotropics and extralimital montane Central and South America is provided.

• Cantharellales
• Coccoloba
• Dicymbe
• ectomycorrhizae
• Guiana Shield
• tropical fungi

Acknowledgments

The authors thank the following for financial support: National Science Foundation DEB-0918591 and the National Geographic Society’s Committee for Research and Exploration to TWH, NSF DEB-0732968 to MCA and the Chicago Botanic Garden for preliminary molecular analyses. French Guiana fieldwork was supported by Investissements d’Avenir grants of the ANR (CEBA: ANR-10-LABX-0025). Dillon Husbands functioned as Guyanese local counterpart and assisted with field collecting, descriptions and specimen processing. Additional field assistance in Guyana was provided by M. Chin, C. Andrew, V. Joseph, P. Joseph, F. Edmund and L. Edmund. Eliane Louisanna provided expert field and lab assistance in French Guiana. Sophie Manzi and Pierre-Arthur Moreau provided technical assistance in France. John Terborgh facilitated field work in Venezuela in 2000. Shawnee Gowan provided lab assistance at Humboldt State. Ron Petersen provided access to specimens at TENN. Two anonymous reviewers provided very useful comments on earlier versions of the manuscript. Research permits were granted by the Guyana Environmental Protection Agency. This paper is No. 198 in the Smithsonian Institution’s Biological Diversity of the Guiana Shield Program publication series.

Notes

4 Additional references not cited elsewhere in the text: Singer 1963; Wu and Mueller 1995; Eyssartier et al. 2003.