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 Achnanthidiumᵀ Kütz. (1844)
Achnanthidium affine (Kützing) Czarnecki (1994)
Achnanthidium archibaldianum (Lange-Bertalot) Lange-Bertalot
Achnanthidium biasolettiana (Grunow) L. Bukhtiyarova (1995)
Achnanthidium contrarea (H. Lange-Bertalot & A. Steindorf) Lange-Bertalot
Achnanthidium convergens (H. Kobayasi) H. Kobayasi
Achnanthidium deflexum (C.W. Reimer) J.C. Kingston
Achnanthidium duthii (Sreen.) M.B. Edlund
Achnanthidium eutrophilum (Lange-Bertalot) Lange-Bertalot
Achnanthidium exilis (Kützing, 1833) L. Bukhtiyarova (1995)
Achnanthidium indicatrix (H. Lange-Bertalot & A. Steindorf) Lange-Bertalot
Achnanthidium japonicum (H. Kobayasi) H. Kobayasi
Achnanthidium koghisense (Gerd Moser, Lange-Bertalot & Metzeltin) Lange-Bertalot
Achnanthidium kranzii (Lange-Bertalot, 1989) Round & L. Bukhtiyarova (1996)
Achnanthidium kryophila (J.B. Petersen, 1924) Bukhtiyarova (1995)
Achnanthidium macrocephalum (Hustedt) Round & L. Bukhtiyarova (1996)
Achnanthidium microcephalum Kützing (1844)
Achnanthidium minutissimum (Kützing, 1833) Czarnecki (1994)
Achnanthidium modestiforme (Lange-Bertalot) van de Vijver
Achnanthidium peridotiticum (Gerd Moser, Lange-Bertalot & Metzeltin) Lange-Bertalot
Achnanthidium pyrenaicum (Hustedt) H. Kobayasi
Achnanthidium saprophila (H. Kobayashi & Mayama) Round & L. Bukhtiyarova (1996)
Achnanthidium straubianum (Lange-Bertalot, 1996) Lange-Bertalot
Achnanthidium subatomus (Hustedt) Lange-Bertalot
Achnanthidium thermale Rabenh.
Achnanthidium ventralis (Krasske) E.Y. Haw & M.G. Kelly (1998)
Achnanthidium woltereckii (Hustedt) Lange-Bertalot