Fossil of Aureofungus yaniguaensis
Aureofungus was a gilled fungus in the order Agaricales. It lived during the Miocene epoch of the Neogene period about 15–20 million years ago.
Aureofungus is known only from the holotype (single physical example) fossil, which is a single fruiting body. Its cap is 3 millimetres (0.12 in) in diameter and has a convex shape sporting a broad raised central region. The lightly textured flesh is yellow-brown in coloration and sports a striated, incurved margin. The lamellae or gills are subdistant and lacking lamellulae, short gills which do not reach the edge of the cap.