Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Lycopodiobiotina Doweld (2001)
     Division †Rhyniophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Rhyniophyta Cronquist, Takht. & Zimmerm. (1966)
       Class †Trimerophytopsida A.S.Foster & Gifford (1974) [monotypic]
         Order †Trimerophytales Kasper, H.N. Andrews & W.H. Forbes (1974) [monotypic]
           Family †Trimerophytaceae Bierhorst (1971)
             1 Genus †Euphyllophyton Kenrick & Crane (1997), orth. inval. see Genus Eophyllophyton S.G.Hao (1988)
             2 Genus †Oocampsa H.N. Andrews, Gensel & Kasper (1975)
             3 Genus †Pauthecophyton J.Z. Xue, S.G.Hao, X. Zhu & De M.Wang (2012)
             4 Genus †Psilophyton Dawson (1859)
             5 Genus †Pertica Kasper & H.N.Andrews (1972)
             6 Genus †Trimerophyton Hopping (1956)