Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superphylum Cycadophytanae Doweld (2001) Phylum †Moresnetiophyta Doweld (2001) see Division Pteridospermatophyta Meyen Class †Moresnetiopsida Doweld (2001) Order †Moresnetiales Doweld (2001) 1 Family †Moresnetiaceae Němejc (1963) 2 Family †Eurystomataceae A.G. Long (1975) 3 Family †Eospermataceae A.G. Long (1975)