Everyone,
Can someone identify this coral-type fossil? It's completely empty inside like a clam and has gills like a mushroom. I've looked through lots of photos in the Forum gallery to no avail. Nothing is even close. The 'top' isn't flat; it's a dome like the tip of your thumb, with holes on the tip.
In the 'mudstone' matrix there's also a typical rugose coral.
This was a loose rock in the area of the Kenogami Formation of limestone in Northern Ontario.
Puzzled,
Lauren16