A waxy, cup-shaped, sessile fungus with a basal mat of hyphal thread. Common on dead wood of deciduous trees

References: 
Læssøe, T. & Petersen, J.H. (2019) Fungi of Temperate Europe, Volume 2
Hansen, L. & Knudsen, H. (2000) Nordic Macromycetes, Vol.1: Ascomycetes