The Porotheleaceae are a family of saprophytic, mainly wood-decay fungi in the order Agaricales that are primarily agarics, but also include cyphelloid and polyporoid members. The family has been informally cited in the literature as the 'hydropoid' clade. The type genus, Porotheleum, was placed in the phylogenetically defined clade in 2002 but the clade was more strongly supported in 2006 but without including Porotheleum. Its sister group is the Cyphellaceae, both in the 'marasmioid clade'. Some included taxa are cultivated by ants.