 Molecular analysis indicates that "Fomitopsis" belongs to the antrodia clade, which contains about 70 percent of brown-rot fungi.Other genera that join "Fomitopsis" in the core antrodia group include "Amyloporia", "Antrodia", "Daedalea", "Melanoporia", "Piptoporus", and "Rhodonia".Studies have indicated that "Fomitopsis" and "Piptoporus" were phylogenetically heterogenous, and the type of that genus, "Piptoporus betulinus", is in the "Fomitopsis" core group.