Pseudotulostoma volvata gen. sp. nov. is described from the south-central P
akaraima Mountains of Guyana, Pqeudotulostoma volvata is associated with ec
tomycorrhizal Dicymbe corymbosa trees (Caesalpiniaceae) and placed in the A
scomycota, Eurotiales, Elaphomycetaceae. Included are a description of the
genus and species, illustrations of the macroscopic and microscopic feature
s, and a discussion of the distinctive features and phylogenetic placement
of this fungus.