Looks like fomes to me.
Drag your finger across the underside and if the mark turns purple then it's a horses hoof.
I dont' think so - that's artist's conk. Fomes doesn't bruise - at least, none that I've ever seen did.
No it's definitely not an eater
It's seen better days
I'll cut it through tonight and for a cross section so Fiona can advise.
Addo knows conks far better than I do by far!!!!
Most of them look pretty similar when they are on the tree. Ganodermas are pretty easy as only that family have brown spore deposits on top the fruit body, most other polypores have white spores.
Quite a few conks cause extensive rot inside the tree, what this rot looks like {white dust, brown cubes} and what the tree is are often more useful to iding it than what it looks like a lot of the time.