So far, some of these groups have been defined cladistically rather than being defined as formal Linnean taxa, though there have been several cases in which older proposed segregates from the Tricholomataceae have been validated by evidence coming from molecular phylogenetics.
Up to now, certain of these groups have been defined using a cladistic approach instead of as formal Linnean taxa. However, there have been multiple cases where previously suggested subgroups within the Tricholomataceae have been confirmed through molecular phylogenetic evidence.