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 †Leptophloeales Lemoigne (1982) see Order Protolepidodendrales Koidzumi (1939)
                 1 Family †Leptophloeaceae Kräusel & Weyland (1949)
                 2 Family †Lycopodiopsidaceae Chaloner (1967)
                 3 Family †Lepidosigillariaceae Kräusel & Weyland (1949)
                 4 Family †Sublepidodendraceae Kräusel & Weyland (1949)