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 Bacillariophycidaeᵀ D.G.Mann (1990) - raphid diatoms
Order Cymbellales D.G.Mann (1990)
Family Cymbellaceaeᵀ Grev. (1833)
Genus Placoneis Mereschk. (1903)
Placoneis clementioides (Hustedt, 1944) E.J. Cox (1987)
Placoneis clementis (Grunow, 1882) E.J. Cox (1987)
Placoneis elginensis (W. Gregory) E.J. Cox (1987)
Placoneis exigua (Gregory) Mereschkovsky (1903)
Placoneis gastrum (Ehrenberg) Mereschkovsky (1903)
Placoneis placentula (Ehrenberg) Heinzerl. (1908)
Placoneis pseudanglica (Lange-Bertalot, 1985) E.J. Cox (1987)