Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Lycopodiobiotina Doweld (2001)
         Phylum Isoëtophyta Doweld (2001)
           Subphylum Isoëtophytina Doweld (2001)
             Class †Lepidocarpopsida Doweld (2001)
               Order †Lepidocarpales G.M. Smith (1938)
                 1 Family †Flemingitaceae B. Thomas & Brack-Hanes (1984) see Family Lepidodendraceae Endl.
                 2 Family †Spenceritaceae B. Thomas & Brack-Hanes ex Doweld (2001), nom. cons. prop. [monotypic]
                 3 Family †Diaphorodendraceae DiMichele & R. Bateman (1992)
                 4 Family †Lepidocarpaceae G.M. Smith (1938), nom. cons. prop.
                 5 Family †Sigillariaceae Unger (1842) see Family Lepidodendraceae Endl.