Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [[crown] organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [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 Isoëtophytinaᵀ Doweld (2001)
                       Class †Lepidocarpopsida Doweld (2001)
                         Order †Lepidocarpalesᵀ G.M. Smith (1938)
                           [Family †"Spenceritaceae" B. Thomas & Brack-Hanes (1984), nom. nud.] see Family Spenceritaceae B. Thomas & Brack-Hanes ex Doweld (2001), nom. cons. prop.