From bathroom air sample.
Fast, radial growth. White thin, mycelia. White at the bottom and covered with tiny black dots on the top.
It resembles Sclerotium cepivorum because of its white mycelium and the black dots covering it which could be sclerotia. However on Sclerotium cepivorum sclerotia don’t seem to be organized in rings and are less dense. I can’t identify this fungi