The Entolomataceae of the Pakaraima Mountains of Guyana I: four new species of Entoloma s. str.

Abstract

This paper constitutes the first documented accounts of Entolomataceae taxa (Agaricales, Basidiomycota) from Guyana. Entoloma olivaceocoloratum, Entoloma rugosostriatum, Entoloma fragilum and Entoloma illinita are described as new species from the Pakaraima Mountains, occurring in rainforests dominated by ectomycorrhizal Dicymbe and Aldina spp. Macromorphological, micromorphological and habitat data are provided for the new species.

• Agaricales
• Basidiomycota
• Dicymbe
• Guiana Shield
• neotropical fungi

This research was made possible by grants to TWH from the National Geographic Society’s Committee for Research and Exploration, the Smithsonian Institution’s Biological Diversity of the Guianas Program, the Linnaean Society of London and the Humboldt State University Foundation. Field assistance in Guyana was provided by Mimi Chin, Christopher Andrew, Leonard Williams, Valentino Joseph, Francino Edmond and Luciano Edmond. MCA also thanks DE Aime and Jordan Mayor for field assistance in 2004. Research permits were granted by the Guyana Environmental Protection Agency. This paper is No. 127 in the Smithsonian Institution’s Biological Diversity of the Guiana Shield ProgramPUBLICation series.