Daedalea quercina ?

Could this be some species of Trametes or Lenzites?

I think some species of Daedalea from the gill structure

To me also it looks like Daedalea quercina where the undersurface is maze-like, with thick walls as very clearly seen in this specimen. I think because it is young its colour is white. It may turn cream coloured later as is generally observed.