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 Fragilariophycidae Round (1990) - core araphid diatoms
Order Fragilarialesᵀ P.C.Silva (1962) [monotypic]
Family Fragilariaceaeᵀ Grev. (1833)
Genus Pseudostaurosira (Grunow) D.M. Williams & Round (1987)
Pseudostaurosira brevistriata (Grunow, in Van Heurck, 1885) D.M. Williams & Round (1987)
Pseudostaurosira pseudoconstruens (Marciniak, 1982) D.M. Williams & Round (1987)
Pseudostaurosira robusta (Fusey) D.M. Williams & Round (1987)