 The aim of the study was to delimit the highly polyphyletic Tricholomataceae, and identyfiy monophyletic groups within the Tricholomatoid clade, which includes the families Tricholimoaceae, Entolomataceae, and Lyophyllaceae.According to this study there have been several different ways of distributing Porpoloma, which is highly polyphyletic.This study suggests that the genus Porpoloma is distributed in four groups within the Trichlomatatic clade; Porpoloma s.str, Corneriella gen.nov.