Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Kickxellomycota Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018)
     Class Harpellomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
       Order Harpellales Lichtw. & Manier (1978)
         Family Legeriomycetaceae Pouzar (1972)
           Genus Trifoliellum Strongman & M.M. White (2011) [monotypic]
             1 Trifoliellum bioblitziiᵀ Strongman & M.M. White