Tapinella panuoides, also known as oyster rollrim and as fan pax from its former binomial Paxillus panuoides, is a species of fungus in the genus Tapinella.
The mushroom has little or no stalk where it emerges from the substrate, with caps up to across. The gills appear to be crimped, forked, or crosshatched close to the base. The spore print is ochre.
In North America it can be confused with poisonous western jack o'lanterns, edible chanterelle mushrooms, false chanterelles (Hygrophoropsis aurantiaca), Crepidotus, or Phyllotopsis.
It grows on conifer wood and in lignin-rich humus.
Despite its pleasant taste, the species is poisonous.
Atromentin is a phenolic compound. The first enzymes in its biosynthesis have been characterised in T. panuoides.