Cyphellaceae are a distinct lineage of cyphelloid fungi within the Agaricales, characterised by minute, cup-like, disc-like, or resupinate fruitbodies with a smooth to slightly wrinkled hymenial surface. Basidiomes are typically thin, delicate, and short-lived, ranging from tiny white cups to effused, leathery crusts. Many species are inconspicuous and often overlooked in the field.

Chondrostereum is a small genus of cyphelloid fungi within the Agaricales (Cyphellaceae), characterised by effused, crust-like, or reflexed basidiomes that often display distinctive violet, lilac, or purplish hues. Fruitbodies form thin, flexible patches on dead wood, bark, or occasionally living stems, sometimes developing short, shelf-like lobes along the margins. The hymenial surface is smooth to slightly wrinkled, lacking gills, pores, or teeth.