Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Plantae Haeckel (1866) - plants
                           Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                             Phylum Chlorophyta Pascher (1914) [coordinate rank] - green algae
                               "core chlorophytes"
                                 Class Ulvophyceae K.R. Mattox & K.D. Stewart (1984) - ulvophytes
                                   "Ulvales-Ulotrichales"
                                     Order Ulotrichales Borzi
                                       Family Gomontiaceae De Toni
                                         Genus Monostroma G. Thuret (1854)
                                           Monostroma arcticum Wittrock (1866)
                                           Monostroma balticum (Aresch.) Wittrock
                                           Monostroma bullosum (Roth) Thuret
                                           Monostroma grevillei (Thuret) Wittrock (1866)
                                           Monostroma obscurum (Kützing) J.Agardh
                                           Monostroma oxycoccum (Kützing) Thuret
                                           Monostroma oxyspermum (Kützing) Doty (1947)
                                           Monostroma saccodeum Kjellman