Identification: Flat light brown fungus on tree trunk

This was seen on Mayne Island.
Patches of flat pieces, light brown with white margins.
I assume they are fungus.

 

Hi David, this fungus belongs to a broad fungal group called "crusts" - mushrooms that have a flat spore-producing surface (as opposed to gills, pores, teeth etc).
It looks very much like mushrooms I've seen that belong to the genus Hymenochaete, but identification would require specimen in hand for genus, and microscopy to get it to species.
I like the colour of these :-)

 

Wow! I didn't know crusts are mushrooms with a spore-producing surface.
Fungi, mushrooms and lichens are such a huge area for exploration.
Many thanks.

 

You are welcome David :-).