Pelagophyceae

Pelagophyceae
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Ochrophyta
Clade:	Diatomista
Clade:	Hypogyrista
Class:	Pelagophyceae ; R.A.Andersen & G.W.Saunders 1993
Orders
	Pelagomonadales ; Sarcinochrysidales ;
Synonyms
	Pelagophycidae Andersen & Saunders 1993 ex Cavalier-Smith 2006; Sarcinochrysidae Cavalier-Smith 1993; Sarcinochrysidophyceae Van Den Hoek, Mann & Jahns 1995;

Last updated October 20, 2025

Pelagophyceae is a class of heterokont algae. It is the sister group of the Dictyochophyceae.^[2]

All known species are marine. They can be single-celled (coccoid or flagellate), palmelloid or filamentous. Some members ( Pelagomonas ) belong to picoplankton, and some other ( Sarcinochrysis ) are macroscopic attached organisms.^[3]

The class contains 13 genera, three families and two orders (2017):^[4]^[5]

Order Pelagomonadales Andersen & Saunders 1993
- Family Pelagomonadaceae Andersen & Saunders 1993
  - Genus Ankylochrysis Billard 1995
  - Genus Aureococcus Hargraves & Sieburth 1988
  - Genus Chrysophaeum Lewis & Bryan 1941 non Taylor 1951
  - Genus Pelagococcus Norris 1977
  - Genus Pelagomonas Andersen & Saunders 1993
Order Sarcinochrysidales Gayral & Billard 1977
- Family Chrysocystaceae Melkonian, Yoon & Andersen 2018
  - Genus Chrysocystis Lobban, Honda & Chihara 1995
  - Genus Chrysoreinhardia Billard 2000
  - Genus Sungminbooa Yoon & Andersen 2018
- Family Sarcinochrysidaceae Gayral & Billard 1977
  - Genus Andersenia Wetherbee & Waller 2015
  - Genus Arachnochrysis Andersen & Han 2018
  - Genus Aureoscheda Wynne & Andersen 2014
  - Genus Aureoumbra Stockwell et al. 1997
  - Genus Chrysonephos Taylor 1952
  - Genus Nematochrysopsis Billard 2000
  - Genus Pelagospilus Andersen & Graf 2018
  - Genus Sarcinochrysis Geitler 1930
  - Genus Sargassococcus Andersen & Han 2018

It is expected that molecular studies will add more species to this list.^[3]

References

↑ Cavalier-Smith, Thomas (2017). "Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences". Protoplasma. 255 (1): 297–357. doi:10.1007/s00709-017-1147-3. PMC 5756292 . PMID 28875267.
↑ Bringloe TT, Starko S, Wade RM, Vieira C, Kawai H, De Clerck O, Cock JM, Coelho SM, Destombe C, Valero M, Neiva J, Pearson GA, Faugeron S, Serrão EA, Verbruggen H (2020). "Phylogeny and Evolution of the Brown Algae" (PDF). Critical Reviews in Plant Sciences. 39 (4): 281–321. Bibcode:2020CRvPS..39..281B. doi: 10.1080/07352689.2020.1787679 .
1 2 Wetherbee R.; Gornik S. G.; Grant B.; Waller R. F. (2015). "Andersenia, a genus of filamentous, sand-dwelling Pelagophyceae from southeastern Australia". Phycologia. 54 (1): 35–48. Bibcode:2015Phyco..54...35W. doi:10.2216/14-107.1.
↑ "Pelagophyceae". WoRMS. World Register of Marine Species . Retrieved 2017-06-13.
↑ Han, K.; Graf, L.; Reyes, C. P.; Melkonian, B.; Andersen, R. A.; Yoon, H. S.; Melkonian, M. (2018). "A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov". Protist. 169 (1): 79–10. doi:10.1016/j.protis.2017.12.004.

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[8phyla-1] Cavalier-Smith, Thomas (2017). "Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences". Protoplasma. 255 (1): 297–357. doi:10.1007/s00709-017-1147-3. PMC 5756292 . PMID 28875267.

[Bringloe_2020-2] Bringloe TT, Starko S, Wade RM, Vieira C, Kawai H, De Clerck O, Cock JM, Coelho SM, Destombe C, Valero M, Neiva J, Pearson GA, Faugeron S, Serrão EA, Verbruggen H (2020). "Phylogeny and Evolution of the Brown Algae" (PDF). Critical Reviews in Plant Sciences. 39 (4): 281–321. Bibcode:2020CRvPS..39..281B. doi: 10.1080/07352689.2020.1787679 .

[Wetherbee_2015-3] 1 2 Wetherbee R.; Gornik S. G.; Grant B.; Waller R. F. (2015). "Andersenia, a genus of filamentous, sand-dwelling Pelagophyceae from southeastern Australia". Phycologia. 54 (1): 35–48. Bibcode:2015Phyco..54...35W. doi:10.2216/14-107.1.

[WoRMS-4] "Pelagophyceae". WoRMS. World Register of Marine Species . Retrieved 2017-06-13.

[5] Han, K.; Graf, L.; Reyes, C. P.; Melkonian, B.; Andersen, R. A.; Yoon, H. S.; Melkonian, M. (2018). "A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov". Protist. 169 (1): 79–10. doi:10.1016/j.protis.2017.12.004.

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