The characteristics of this mushroom are that it is shaped like a trumpet and is thick with small hairs, and when it is still young this mushroom has a brownish white color, then turns completely brown when it grows up.
Then there is also the Trametes Betulina mushroom, a mushroom that is also from the Polyporaceae family, which I found growing on dead trees that have been cut down for a long time. And here are some photos