life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Superkingdom Eukarya Chatton, 1925 see Domain Eukaryota Chatton, 1925 Kingdom Plantae Haeckel (1866) - plants Tracheata see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) Phylum Psilophyta see Infraphylum Psilophytae T. Cavalier-Sm. (1998) Genus Psilotum Sw. (1801) Psilotum complanatum Sw. (1801) - flatfork fern