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 Khakista Caval.-Sm. (2000)
Diatomea Kütz. (1844)
Class Bacillariophyceae Haeckel (1878) - pennates
Subclass Urneidophycidae Medlin (2016) - basal araphid diatoms
Order Plagiogrammales Gogorev & Stepanova (2015) [monotypic]
Family Plagiogrammaceaeᵀ De Toni (1890)
1 Genus Plagiogrammaᵀ Grev. (1859)
2 Genus Dimeregramma Ralfs (1861)
3 Genus Glyphodesmis Grev. (1862)
4 Genus Neofragilaria T.V. Desikachary, A.K.S.K. Prasad & P. Prema (1987)
5 Genus Talaroneis W.H.C.F. Kooistra & M. De Stefano (2004)
6 Genus Psammogramma S. Sato & Medlin (2008)
7 Genus Psammoneis S. Sato, Kooistra & Medlin (2008)
8 Genus Orizaformis Witkowski, Chunlian Li & Ashworth (2015)