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) Genus †Elkinsia G.W. Rothwell, S.E. Scheckler & W.H. Gillespie (1989)