The Selva Pascuala mural, a work of post-Paleolithic rock art in Spain, contains fungoid figures herein hypothesized to depict neurotropic fungi, especially Psilocybe hispanica, a species that occurs in a neighboring region. This hypothesis is based on features of these figures related to fungal morphology, along with ethnographic analogy, and shamanistic explanations of rock art. If correct, this interpretation would support inference of prehistoric utilization of this fungus in the region. The mural represents the first direct evidence for possible ritual use of Psilocybe in prehistoric Europe.
Akers, B. P., Ruiz, J. F., Piper, A., & Ruck, C. A. P. (2011). A Prehistoric Mural in Spain Depicting Neurotropic Psilocybe Mushrooms?. Economic Botany, 65(2), 1–8. http://dx.doi.org/10.1007/s12231-011-9152-5
Link to full text