"Tapinella atrotomentosa" and its relative "T. panuoides" were placed in a separate genus "Tapinella" on account of their habit of growing on (and rotting) wood, and microscopic differences including much smaller spore size, lack of cystidia, and differing basidia.Their off-centre stipe also distinguished them from other members of the genus "Paxillus", and genetic analysis confirmed them as only distantly related.