organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Eukaryota Chatton, 1925 - eukaryotes Kingdom Plantae Haeckel (1866) - plants Subkingdom Viridaeplantae Cavalier-Sm. (1981) - green plants see [unranked] Viridiplantae Cavalier-Smith, 1981 Land plants Phylum Pteridophyta Schimp. (1879) see Phylum Filicinophyta Class †Cladoxylopsida Novák (1930) - cladoxylopsids see Class Equisetopsida C.Agardh (1825) Order †Iridopteridales W.E.Stein (1982) see Order Cladoxylales W.Zimm. (1930)