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 Achnanthales P.C.Silva (1962)
Family Achnanthidiaceae D.G.Mann (1990)
Genus Planothidium Round & Bukhtiyarova (1996)
Planothidium apiculatum (R.M. Patrick) Lange-Bertalot
Planothidium aueri (Krasske) Lange-Bertalot
Planothidium baicalense (Skvortzov & K.I. Meyer) M.B. Edlund
Planothidium biporomum (M.H. Hohn & J. Hellerman) Lange-Bertalot
Planothidium borneolanceolatum (Lange-Bertalot) Lange-Bertalot
Planothidium calcar (Cleve, 1891) F.E. Round & L. Bukhtiyarova
Planothidium chilense (Hustedt) Lange-Bertalot
Planothidium daui (Foged, 1962) Lange-Bertalot
Planothidium delicatulum (Kützing, 1844) F.E. Round & L. Bukhtiyarova
Planothidium deperditum (Giffen) Witkowski
Planothidium diplopunctatum (Simonsen) Witkowski
Planothidium dispar (Cleve, 1891) Witkowski
Planothidium distinctum (Messik., 1954) Lange-Bertalot
Planothidium dubium (Grunow) F.E. Round & L. Bukhtiyarova (1996)
Planothidium ellipticum (Cleve) F.E. Round & L. Bukhtiyarova (1996)
Planothidium engelbrechtii (Cholnoky, 1955) F.E. Round & L. Bukhtiyarova
Planothidium fonticolanceolatum (Lange-Bertalot & Schimanski) Lange-Bertalot
Planothidium fragilarioides (J.B. Petersen, 1924) F.E. Round & L. Bukhtiyarova
Planothidium frequentissimum (Lange-Bertalot) F.E. Round & L. Bukhtiyarova (1996)
Planothidium granum (M.H. Hohn & Hellerman, 1963) Lange-Bertalot
Planothidium haukianum (Grunow) F.E. Round & L. Bukhtiyarova
Planothidium haynaldii (Schaarschmidt em. A.Cleve) E.Y. Haw & M.G. Kelly
Planothidium heidenii (Schulz-Danzig) Witkowski
Planothidium heteromorphum (Grunow) Lange-Bertalot
Planothidium holstii (Cleve, 1881) Lange-Bertalot
Planothidium infrequens Lange-Bertalot & U. Rumrich
Planothidium jacobii (Manguin) Metzeltin & Lange-Bertalot
Planothidium jan-marcinii (Witkowski et al.)
Planothidium joursacense (Héribaud, 1903) Lange-Bertalot
Planothidium lanceolatoides (H.E. Sovereign) Lange-Bertalot
Planothidium lanceolatum (Bréb. ex Kützing) F.E. Round & L. Bukhtiyarova
Planothidium lilljeborgei (Grunow, 1881) Witkowski
Planothidium linkei (Hustedt, 1939) Lange-Bertalot
Planothidium magnificum (Hustedt) Lange-Bertalot
Planothidium marinum (Hustedt) Lange-Bertalot
Planothidium minutissimum (Krasske) Lange-Bertalot
Planothidium miotum (J.R. Carter) Lange-Bertalot
Planothidium neglectum Lange-Bertalot & U. Rumrich
Planothidium oculatum (Hustedt) Witkowski
Planothidium oestrupii (A.Cleve-Euler) F.E. Round & L. Bukhtiyarova
Planothidium peragallii (J. Brun & Héribaud, in Héribaud, 1893) Round
Planothidium pericavum (J.R. Carter) Lange-Bertalot
Planothidium polaris (Østrup) Witkowski
Planothidium pseudotanense (A.Cleve-Euler, 1953) Lange-Bertalot
Planothidium pungens (Cleve-Euler) Lange-Bertalot
Planothidium quarnerensis (Grunow) Witkowski
Planothidium rhombicuneatum Lange-Bertalot & U. Rumrich
Planothidium robustius Lange-Bertalot
Planothidium robustum (Hustedt) Lange-Bertalot
Planothidium rostratum (Østrup, 1903) F.E. Round & L. Bukhtiyarova (1996)
Planothidium salvadorianum (Hustedt) Lange-Bertalot
Planothidium schwabei (Krasske) Lange-Bertalot
Planothidium septentrionalis (Østrup, 1910) F.E. Round & L. Bukhtiyarova (1996)
Planothidium slupskii Metzeltin & Lange-Bertalot