Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Lycopodiobiotina Doweld (2001)
     Division Lycopodiophyta D.H.Scott (1900) see Phylum Lycopodiophyta D.H.Scott (1900)
       Class Isoëtopsida Rolle (1884)
         Order †Lepidodendrales Haeckel (1868)
           1 Family †Lepidodendraceae Endl.
           2 Family †Diaphorodendraceae DiMichele & R. Bateman (1992) [monotypic]
           3 Family †Spenceritaceae B. Thomas & Brack-Hanes ex Doweld (2001), nom. cons. prop.
           4 Family †Diplotegiaceae Corda (1845) [monotypic]
           5 Family †Diploxylaceae Corda (1845) [monotypic]
           6 Family †Tessellariaceae Eichw. (1854) [monotypic]