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Dense kelp forest with understorey at Partridge Point near Dave's Caves, Cape Peninsula
Dense kelp forest with understory at Partridge Point near Dave's Caves, Cape Peninsula
Scientific classification e
Kingdom: Chromista
Subkingdom: Harosa
Infrakingdom: Heterokonta
Phylum: Ochrophyta
Cavalier-Smith, 1995[1]

Ochrophyta is a group of mostly photosynthetic heterokonts.[5][6] Their plastid is of red algal origin.[7]

The classification of the group is still being worked out. Some authors (e.g., Cavalier-Smith) divide it into two subphyla, Phaeista Cavalier-Smith 1995 (comprising Hypogyristea and Chrysista in some classifications, or Limnista and Marista in others) and Khakista Cavalier-Smith, 2000 (comprising Bolidomonas and diatoms).[8] Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014).[citation needed]


Based on the following works of Ruggiero et al. 2015 & Silar 2016.[9][10]


Bolidophyceae Guillou & Chretiennot-Dinet 1999

Bacillariophyceae Haeckel 1878 (Diatoms)


Dictyochophyceae Silva 1980

Pelagophyceae Andersen & Saunders, 1993


Pinguiophyceae Kawachi et al. 2002

Eustigmatophyceae Hibberd & Leedale 1971


Picophagea Cavalier-Smith 2006

Synchromophyceae Horn & Wilhelm 2007

Leukarachnion Geitler 1942

Chrysophyceae Pascher 1914 (golden-brown algae)


Raphidophyceae s.l.


Phaeophyceae Hansgirg 1886 (brown algae)

Chrysomerophyceae Cavalier-Smith 1995

Phaeothamniophyceae Andersen & Bailey 1998 s.l.

Xanthophyceae Allorge 1930 emend. Fritsch 1935 (yellow-green algae)


  1. ^ Cavalier-Smith T (1995). "Zooflagellate phylogeny and classification". Cytology. 37: 1010–1029.
  2. ^ Cavalier-Smith, T. (1986). The kingdom Chromista, origin and systematics. In: Round, F.E. and Chapman, D.J. (eds.). Progress in Phycological Research. 4: 309–347.
  3. ^ Reviers, B. de. (2006). Biologia e Filogenia das Algas. Editora Artmed, Porto Alegre, p. 157.
  4. ^ Reviers, B. de. (2006). Biologia e Filogenia das Algas. Editora Artmed, Porto Alegre, pp. 15-16.
  5. ^ Thomas Cavalier-Smith & Ema E.-Y. Chao (2006). "Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista)". Journal of Molecular Evolution. 62 (4): 388–420. Bibcode:2006JMolE..62..388C. doi:10.1007/s00239-004-0353-8. PMID 16557340.
  6. ^ Ingvild Riisberga; Russell J. S. Orr; Ragnhild Kluge; Kamran Shalchian-Tabrizi; Holly A. Bowers; Vishwanath Patil; Bente Edvardsen; Kjetill S. Jakobsen (2009). "Seven gene phylogeny of heterokonts". Protist. 160 (2): 191–204. doi:10.1016/j.protis.2008.11.004. PMID 19213601.
  7. ^ Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
  8. ^ "Heterokontophyta". SHIGEN. National Institute of Genetics. Retrieved June 18, 2009.
  9. ^ Ruggiero; et al. (2015), "Higher Level Classification of All Living Organisms", PLoS ONE, 10 (4): e0119248, Bibcode:2015PLoSO..1019248R, doi:10.1371/journal.pone.0119248, PMC 4418965, PMID 25923521
  10. ^ Silar, Philippe (2016), "Protistes Eucaryotes: Origine, Evolution et Biologie des Microbes Eucaryotes", HAL Archives-ouvertes: 1–462