organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Tracheata see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
         Phylum †Progymnospermophyta Lang (1925) - progymnosperms see Class Progymnospermopsida Beck (1960)
           1 Order †Aneurophytales Beck (1957)
           1.n Order †Archaeopteridales W.Zimm. (1930)
           1.n.n.1? Order †Protopityales Walton (1957)