There is some confusion over the family placement of Panellus serotinus, also knowns as Panus serotinus and now Sarcomyxa serotina species. When called Panellus serotinus, it was placed in the Mycenaceae. However other sources have it in the Tricholomataceae, the Marasmiaceae or the Hygrophoraceae. It is now placed in the newly erected Sarcomyxaceae family.