Fig. 2.

Abrigo do Letreiro cave in the Furna Feia National Park, Brazil. A. Outside skylight view and the tree Erythrina velutina (Fabaceae). B. Inside skylight view and the tree E. velutina. C. Sampling point 2 and cave paintings with geometric tradition and symbolist style distributed along the walls and ceiling of the cave. D. A small colony of bats (Peropteryx macrotis) at the sampling point 1. E. Petri dishes used to sample airborne fungi at the sampling point 2. Photos were taken by D.M. Bento.