Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
       Division †Pteridospermatophyta Meyen
         Class †Moresnetiopsida Doweld (2001)
           Order †Moresnetiales Doweld (2001)
             Family †Moresnetiaceae Němejc (1963)
               1 Genus †Aglosperma J.Hilton & D.Edwards (1996)
               2 Genus †Elkinsia G.W. Rothwell, S.E. Scheckler & W.H. Gillespie (1989)
               3 Genus †Genomosperma A.G. Long (1959)
               4 Genus †Kerryia G.W.Rothwell & D.C. Wight (1989)
               5 Genus †Moresnetia Stockmans (1948)
               6 Genus †Ruxtonia Galtier, R. Feist, J.A. Talent & B. Meyer-Berthaud (2007)
               7 Genus †Serpentocarpus Naugolnykh (2012)