Fungus identified

Tom Volk, a professor of biology at University of Wisconsin-La Crosse, has identified my fungus. (Not my fungus, it's on a neighbour's tree.) It's Polyporous squamosis. Thanks!

I need a mycologist, stat!

These fungi(?) are growing on my neighbour's maple tree on the north shore of Lake Erie. They are enormous, as local fungi go (and shapely too). The lower one is ten inches wide, the upper eight.

I'd love to know what they are. I'm hoping a Circus of the Spineless or Tangled Bank reader can enlighten me. Please leave a note in the comments for everybody to see if you know what it is.