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 Chromista Caval.-Sm. (1981) - chromists
                           Subkingdom Harosa Cavalier-Smith, 2010
                             [crown] Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Infrakingdom Halvaria Cavalier-Smith, 2010
                                 Superphylum Heterokonta Caval.-Sm. (1986)
                                   Phylum Ochrophyta Caval.-Sm. (1995)
                                     Subphylum Phaeista Caval.-Sm. (1995)
                                       Infraphylum Marista Caval.-Sm. (2006)
                                         Superclass Fucistia Caval.-Sm. (1995)
                                           Class Xanthophyceae P. Allorge ex Fritsch (1935) - yellow-green algae
                                             Order Mischococcales
                                               Family Pleurochloridaceae Pascher (1937)
                                                 Genus Ellipsoidion A. Pascher (1937)
                                                   01 Ellipsoidion solitare
                                                   02 Ellipsoidion stellatum H. Ettl
                                                   03 Ellipsoidion perminimum
                                                   04 Ellipsoidion anulatum Pascher
                                                   05 Ellipsoidion simplex Pascher
                                                   06 Ellipsoidion ovoideum Pascher
                                                   07 Ellipsoidion pachydermum H. Ettl
                                                   08 Ellipsoidion regulare Pascher
                                                   09 Ellipsoidion oocystoides Pascher
                                                   10 Ellipsoidion parvum H. Reisigl
                                                   11 Ellipsoidion stichococcoides Pascher
                                                   12 Ellipsoidion pulchrum Pascher
                                                   13 Ellipsoidion acuminatum Pascher