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 Ulotrichaceaeᵀ Kützing
                                         Genus Heterogonium P.A. Dangeard (1911), nom. illeg.
                                         Genus Heterothrichopsis M.O.P. Iyengar & S. Kanthamma (1941)
                                         Genus Hormidium sensu G.A. Klebs (1896)
                                         ?Genus Hormotrichopsis
                                         ?Genus Microsporopsis W. Vischer (1940)
                                         01 Genus Acrosiphonia J.Agardh (1846)
                                         02 Genus Chlorhormidium Fott
                                         03 Genus Chlorocystis L. Reinhard
                                         04 Genus Chlorothrix Y. Berger-Perrot (1982)
                                         05 Genus Didymothrix Y.X. Wei & H.J. Hu
                                         06 Genus Fottea F. Hindák (1968)
                                         07 Genus Gloeotilopsis Iyengar & Philipose (1956)
                                         08 Genus Hormidiospora G. Vinatzer (1975)
                                         09 Genus Pearsoniella Fritsch & Rich
                                         10 Genus Psephotaxus W.West & G.S.West (1897)
                                         11 Genus Pseudoneochloris S. Watanabe, A. Himizu, L.A. Lewis, G.L. Floyd & P.A. Fuerst (2000) [monotypic]
                                         12 Genus Pseudoschizomeris T. Deason & H. Bold
                                         13 Genus Raphidonemopsis T. Deason (1969)
                                         14 Genus Spongomorpha Kützing (1843)
                                         15 Genus Ulothrixᵀ F.T. Kützing (1833)
                                         16 Genus Ulotrichopsis L. Wichmann (1937)
                                         17 Genus Urospora Aresch. (1866), nom. cons.