Dark, hemispherical, fungal fruiting bodies of Annulohypoxylon (=Hypoxylon) thouarsianum, on coast live oak trunk and bark removed to reveal galleries of the western oak bark beetle, Pseudopityophthorus pubipennis.

Dark hemispherical Hypoxylon fungal fruiting bodies on coast live oak, bark removed to reveal oak bark beetle Pseudopityophthorus pubipennis galleries. Marin Co. By Pavel Svihra.  Credit: Pavel Svihra
Credit: Pavel Svihra