Wildlife Spotting

The difference between Favolaschia and Favolus is that the former is actually compareable with a poroid Mycena (placed in the family Mycenaceae) and the latter is a true Polypore (Polyporaceae). With that in mind, I believe you could feel it in the structure of the mushroom. Polypores tend to be more leathery, more firm, than the fragile mycenoid mushrooms. Thus, I dare not to which of the two it is and may you consider my former comment as a starting point for further investigation, but not as a solid identification.

Indeed CorduneanuVlad! This is or is close to Favolaschia pustulosa, one of the white species of Favolaschia ;)

From the underside, it looks similar to Favolaschia Calocera, maybe something in the same family...