Looks very much like a species of Hymenochaete. Did you turn the wood over to photograph this? I ask because, to allow optimum spore dispersal, Hymenochate fruitbodies need to be facing more-or-less downward.
@Hejor1 sometimes the sexual and asexual states of a given fungus appear at the same time but it is also common to see just one state alone. The different states may need different triggers to start their development.