Kuntze (1891) Cantharellus guyanensis is a tropical South American species of mushroom-forming fungus in the chanterelle genus (Cantharellus), first described by Camille Montagne from French Guiana in 1854.

The fruit bodies have a bright orange cap colour and occur in medium- to large-sized troops.

C. guyanensis seems to prefer sand-rich soil and forms ectomycorrhiza with a putatively wide range of host trees and shrubs including Coccoloba, Guapira, and Neea.

Its congeners Cantharellus aurantioconspicuus, C. amazonensis, and C. protectus, all described from Brazil, are similar species.

[3] Although edible, C. guyanensis seems to be shunned by the Patamona people of Guyana who however use several other mushroom species occurring in their land.