living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Bryophyta A.Braun (1864) - mosses and liverworts see Phylum Bryophyta A.Braun (1864)
           Class Hepaticopsida see Class Marchantiopsida Cronquist, Takht. & W.Zimm. (1966)
             Subclass Jungermanniidae Engl. (1893)
               Order Calobryales Hamlin
                 Suborder Takakiinae see Order Takakiales S. Hatt. & Inoue ex R.M. Schust. (1963)
                   Family Takakiaceae S. Hatt. & Inoue (1958), nom. nud. see Family Takakiaceae M.Stech & W.Frey (2008)
                     Genus Takakia S. Hatt. & Inoue (1958)
                       Takakia ceratophylla (Mitt.) Grolle (1963)