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Ochrophyte

Ochrophytes
Temporal range: Middle Proterozoic[1]
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 Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Clade: Stramenopiles
Phylum: Gyrista
Subphylum: Ochrophytina
Cavalier-Smith 1986 emend. 1996[2]
Type genus
Fucus
Linnaeus, 1753
Classes[4]

Incertae sedis:

Diversity
23,314 described species[5]
>100,000 estimated species[6]
Synonyms

Ochrophytes, also known as heterokontophytes or stramenochromes, are a group of algae. They are the photosynthetic stramenopiles, a group of eukaryotes, organisms with a cell nucleus, characterized by the presence of two unequal flagella, one of which has tripartite hairs called mastigonemes. In particular, they are characterized by photosynthetic organelles or plastids enclosed by four membranes, with membrane-bound compartments called thylakoids organized in piles of three, chlorophyll a and c as their photosynthetic pigments, and additional pigments such as β-carotene and xanthophylls. Ochrophytes are one of the most diverse lineages of eukaryotes, containing ecologically important algae such as brown algae and diatoms. They are classified either as phylum Ochrophyta or Heterokontophyta, or as subphylum Ochrophytina within phylum Gyrista. Their plastids are of red algal origin.

  1. ^ Cite error: The named reference Butterfield 2004 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Cavalier-Smith 1996 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Olisthodiscophyceae was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Bringloe 2020 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Guiry 2024 was invoked but never defined (see the help page).
  6. ^ H.S. Yoon; R.A. Andersen; S.M. Boo; D. Bhattacharya (17 February 2009). "Stramenopiles". Encyclopedia of Microbiology (Third Edition): 721–731. doi:10.1016/B978-012373944-5.00253-4. ISBN 978-0-12-373944-5. Retrieved 2 March 2024.
  7. ^ Cite error: The named reference Guiry 2023 was invoked but never defined (see the help page).
  8. ^ 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.
  9. ^ a b Reviers, B. de. (2006). Biologia e Filogenia das Algas. Editora Artmed, Porto Alegre, p. 157.

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