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) 1[2] Class †Lepidocarpopsida Doweld (2001) 2[3] Class Isoëtopsida Rolle (1884)