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 Trebouxiophyceae T. Friedl (1995) - trebouxiophytes
                                   Order Oocystales
                                     Family Oocystaceaeᵀ Bohlin
                                       Subfamily Oocystoideaeᵀ
                                         Genus Oocystisᵀ A.Braun
                                           Oocystis eremosphaeria sensu R.C. Starr (1960)
                                           Oocystis gigas Lagerheim
                                           Oocystis gloeocystiformis
                                           Oocystis pyriformis
                                           01 Oocystis alpina Reisigl
                                           02 Oocystis apiculata W.West
                                           03 Oocystis asymmetrica W.West & G.S.West
                                           04 Oocystis australiensis Playfair
                                           05 Oocystis borgei J. Snow
                                           06 Oocystis chodati Playfair
                                           07 Oocystis ecballocystiformis Iyengar
                                           08 Oocystis elliptica West
                                           09 Oocystis hunanensis C.C. Jao
                                           10 Oocystis lacustris Chodat
                                           11 Oocystis mamillata
                                           12 Oocystis marssonii Lemmermann (1898)
                                           13 Oocystis minuta Guillard et al.
                                           14 Oocystis naegelii A.Braun
                                           15 Oocystis natans (Lemmermann) Lemmermann (1908)
                                           16 Oocystis nodulosa W.West
                                           17 Oocystis nordstedtiana (De Toni) Playfair
                                           18 Oocystis novaesemliae Wille
                                           19 Oocystis ovalis (W.B. Turner) W.West & G.S.West
                                           20 Oocystis panduriformis W.West & G.S.West (1894)
                                           21 Oocystis parva W.West & G.S.West
                                           22 Oocystis pelagica Lemmermann
                                           23 Oocystis planctonica Chodat
                                           24 Oocystis polymorpha
                                           25 Oocystis pusilla Hansgirg
                                           26 Oocystis rifeum P. González
                                           27 Oocystis rotula Playfair
                                           28 Oocystis rupestris Kirchner
                                           29 Oocystis socialis Ostenfeldt
                                           30 Oocystis solitaria Wittrock, in Wittrock & Nordst.
                                           31 Oocystis striata P. González
                                           32 Oocystis subhexagona Playfair
                                           33 Oocystis submarina Lagerheim
                                           34 Oocystis subsphaerica Playfair