Ochrophyta

Short description: Phylum of algae

Ochrophyta

Dense kelp forest with understory at Partridge Point near Dave's Caves, Cape Peninsula
Scientific classification
Clade:  | SAR
Infrakingdom:  | Heterokonta
Phylum:  | Ochrophyta
Classes

* Actinochrysophyceae
* Bacillariophyceae
* Bolidophyceae
* Chrysomerophyceae
* Chrysophyceae
* Dictyochophyceae
* Eustigmatophyceae
* Pelagophyceae
* Phaeophyceae
* Phaeothamniophyceae
* Picophagea
* Pinguiophyceae
* Raphidophyceae
* Synchromophyceae
* Synurophyceae
* Xanthophyceae

Synonyms

* Heterokontophyta van den Hoek et al., 1978
* Ochrista Cavalier-Smith, 1986[1][2]
* Stramenochromes Leipe et al., 1994[3]

Ochrophyta is a group of mostly photosynthetic heterokonts.[4][5] Their plastid is of red algal origin.[6]

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).[7] Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014).

## Phylogeny

Based on the work of Ruggiero et al. (2015)[8] and on Silar (2016).[9]

Ochrophyta |  |  Khakista |  |  |

Bolidophyceae
(Guillou & Chretiennot-Dinet 1999)

|

Bacillariophyceae – diatoms
(Haeckel 1878)

Phaeista |  |  Hypogyrista |  |  |

Dictyochophyceae
(Silva 1980)

|

Pelagophyceae
(Andersen & Saunders, 1993)

Chrysista |  |  Eustigmista |  |  |

Pinguiophyceae
(Kawachi et al. 2002)

|

Eustigmatophyceae
(Hibberd & Leedale 1971)

|  |  Phagochrysia |  |  |

Picophagea
(Cavalier-Smith 2006)

|

|  |  |

Synchromophyceae
(Horn & Wilhelm 2007)

|

|  |  |

Leukarachnion
(Geitler 1942)

|

Chrysophyceae – golden-brown algae
(Pascher 1914)

Xanthophytina |  |  Raphidoistia |

Raphidophyceae s.l.

|

Fucistia |  |  |

Phaeophyceae – brown algae
(Hansgirg 1886)

|

|  |  |

Chrysomerophyceae
(Cavalier-Smith 1995)

|

|  |  |

Phaeothamniophyceae s.l.
(Andersen & Bailey 1998)

|

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

## References

1. ↑ 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.
2. ↑ Reviers, B. de. (2006). Biologia e Filogenia das Algas. Editora Artmed, Porto Alegre, p. 157.
3. ↑ Reviers, B. de. (2006). Biologia e Filogenia das Algas. Editora Artmed, Porto Alegre, pp. 15-16.
4. ↑ Thomas Cavalier-Smith; Ema E.-Y. Chao (2006). "Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista)". Journal of Molecular Evolution 62 (4): 388–420. doi:10.1007/s00239-004-0353-8. PMID 16557340. Bibcode: 2006JMolE..62..388C.
5. ↑ 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.
6. ↑ Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
7. ↑ "Heterokontophyta". SHIGEN. National Institute of Genetics. http://www.shigen.nig.ac.jp/algae_tree/HeterokontophytaE.html.
8. ↑ Ruggiero, Michael A. (2015). "Higher level classification of all living organisms". PLoS One 10 (4): e0119248. doi:10.1371/journal.pone.0119248. PMID 25923521. Bibcode: 2015PLoSO..1019248R.
9. ↑ Silar, Philippe (2016). "Protistes eucaryotes: Origine, evolution et biologie des microbes eucaryotes". Université Paris Cité. pp. 1–462. https://hal.archives-ouvertes.fr/hal-01263138.

* v
* t
* e

Eukaryota: SAR: Heterokonta or Stramenopiles

Domain
Archaea
Bacteria
Eukaryota
(Supergroup
Plant
Hacrobia
Heterokont
Alveolata
Rhizaria
Excavata
Amoebozoa
Opisthokonta

Animal
Fungi)

Ochrophyta
(mostly
photosynthetic)|

| Phaeista|

| Hypogyristea|

* Pinguiophyceae
* Pelagophyceae

| Dictyochophyceae/
Actinochrysophyceae/
Axodines|

* Dictyochales/Silicoflagellates
* Rhizochromulinales
* Florenciellales
* Actinodines
* Pedinellales
* Ciliophryida
* Actinophryida

|

Chrysista|

| Chrysophyceae,
golden algae|

* Chromulinales
* Chrysosphaerales
* Hibberdiales
* Hydrurales
* Phaeothamniales

|

Eustigmatophyceae|

* Eustigmataceae
* Monodopsidaceae
* Pseudocharaciopsidaceae

Phaeophyceae,
brown algae|

* Ascoseirales
* Desmarestiales
* Dictyotales
* Discosporangiales
* Ectocarpales
* Fucales
* Ishigeales
* Laminariales
* Nemodermatales
* Onslowiales
* Ralfsiales
* Scytothamnales
* Sphacelariales
* Sporochnales
* Syringodermatales
* Tilopteridales

Phaeothamniophyceae|

* Phaeothamniales
* Pleurochloridellales

Raphidophyceae|

* Chattonella, Fibrocapsa, Gonyostomum|Gonyostomum, Haramonas, Heterosigma, Vacuolaria]]

Synurophyceae|

* Heterogloeales
* Ochromonadales
* Rhizochloridales
* Synurales

Xanthophyceae,
yellow-green algae|

* Botrydiales
* Mischococcales
* Tribonematales
* Vaucheriales

Khakista|

| Bolidophyceae|

* Triparma

|

Bacillariophyta,
diatoms|

| Coscinodiscophyceae|

* Biddulphiophycidae
* Chaetocerotophycidae
* Corethrophycidae
* Coscinodiscophycidae
* Cymatosirophycidae
* Lithodesmiophycidae
* Rhizosoleniophycidae
* Thalassiosirophycidae

|

Bacillariophyceae|

* Bacillariales
* Naviculales

Fragilariophyceae|

* Fragilariales

Heterotrophic
groups|

| Pseudofungi|

* Oomycetes
* Hyphochytriomycetes

|

Bigyra|

* Bigyromonadea
* Bicosoecea

| Sagenista|

* Labyrinthulomycetes
* Eogyrea

|

Opalinata/Slopalinida|

* Opalinidae
* Proteromonadidae
* Blastocystis

See also Wikidata entry Q1048772.

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