Ochroconis lascauxensis is a species of fungus of the Ascomycota phylum that was officially described in May 2012. The organism was obtained and isolated from Lascaux Cave in France, where it had begun appearing on the Paleolithic cave paintings on the walls of the cave. Along with the discovery of Ochroconis lascauxensis, the closely related Ochroconis anomala was also discovered on the paintings. The black stains that they caused first began being observed in 2001 and spread so far that they were considered to be a large concern by 2007.