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)
1 Class Chrysomerophyceae Caval.-Sm. (1995) [monotypic]
2.1.1 Class Xanthophyceae P. Allorge ex Fritsch (1935) - yellow-green algae
2.1.2 Class Phaeothamniophyceae R.A. Andersen & J.C. Bailey (1998)
2.2.1 Class Schizocladiophyceae Henry, Okuda & Kawai (2003) [monotypic]
2.2.2 Class Phaeophyceae Hansgirg (1886) - brown algae