[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Plantae Haeckel (1866) - plants
     Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) - vascular plants
       Division Pteridophyta Schimp. (1879) see Subphylum Pteridophytina (Eichler) Cavalier-Sm. (1998)
         1 Class †Rhyniopsida Krysht. (1925)
         2 Class Lycopsida - club-mosses see Class Lycopodiopsida Bartl. (1830)
         3 Class Psilotopsida D.H.Scott (1909) see Subclass Ophioglossidae Klinge (1882)
         4 Class Sphenopsida see Class Equisetopsida C.Agardh (1825)
         5 Class Pteropsida see Infraphylum Moniliformopses Kenrick & P.R.Crane (1997), nom. inval.