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 Bryopsida McClatchie (1897) - mosses
             Subclass Bryidae Engl. (1892) - mosses
               Superorder Haplolepideae see Subclass Dicranidae Doweld (2001)
                 Order Grimmiales M. Fleisch.
                   Family Grimmiaceae Arn.
                     Genus Rhacomitrium see Genus Racomitrium Brid. (1819)
                       Rhacomitrium crispulum see Racomitrium crispulum (Hook.f. & Wilson) Hook.f. & Wilson (1854)