Biology:Hacrobia

From HandWiki
Short description: Group of algae

Hacrobia
Gephyrocapsa oceanica color.jpg
The coccolithophore Gephyrocapsa oceanica
Scientific classification e
Domain: Eukaryota
Clade: Diaphoretickes
Kingdom: Chromista
Subkingdom: Hacrobia
Okamoto et al., 2009
Groups
Synonyms
  • CCTH
  • Eukaryomonadae

The cryptomonads-haptophytes assemblage is a proposed but disputed monophyletic grouping[1] of unicellular eukaryotes that are not included in the SAR supergroup. Several alternative names have been used for the group, including Hacrobia (derived from "ha-" referring to Haptophyta, "-cr-" referring to cryptomonads, and "-bia" as a general suffix referring to life);[2] CCTH (standing for Cryptophyta, Centrohelida, Telonemia and Haptophyta);[3] and "Eukaryomonadae".[4]

(As of February 2012), it is unclear whether this group is monophyletic or not; results of phylogenetic studies are "often dependent on the selection of taxa and gene data set".[3] Two 2012 studies produced opposite results.[3][5]

Members

In the past, heterokonts, haptophytes, and cryptomonads have sometimes been grouped together in a group known as chromists.[6] Though the heterokonts are now split out, Cryptophyta and Haptophyta are considered in some studies to be closely related[7][8] (and are sometimes simply referred to as the "Cryptophyta+Haptophyta" group).[9] A 2009 paper suggested that the Telonemia and centrohelids may form a clade with the cryptophytes and haptophytes.[10] The picobiliphytes may belong in this group but are too poorly known to be classified with confidence.[2]

Several recent studies have concluded that Haptophyta and Cryptophyta do not form a monophyletic group.[11] The former are a sister group to the SAR group, the latter cluster with the Archaeplastida (plants in the broad sense).[5] (As of February 2012), it remains unclear whether the Hacrobia forms a monophyletic group.[3]

Another study[12] suggested the following arrangement: centrohelids are related to haptophytes and form the clade Haptista; Haptista is the sister group to SAR; Cryptista are related to Archaeplastida; and Haptista + SAR is the sister clade to Cryptista + Archaeplastida.

Phylogeny

Based on work done by Silar 2016.[13][14]

Hacrobia
 
Alveidia

Alveidea[15]

 
Haptista
Centroheliozoa

Centrohelea

 
Haptophytina
Rappemonada

Rappephyceae

 
Haptomonada
 

Pavlovophyceae

 
 

Prymnesiophyceae

 
 
 
 
 
Cryptista s.l.
Corbihelia
Endohelia

Endohelea

 
Corbistoma
 

Picomonadea

 
 

Telonemea

 
 
 
Cryptista s.s.
Palpitia

Palpitea

 
Rollomonadia
Leucocrypta

Leucocryptea

 
Cryptomonada
 

Goniomonadea

 
 

Cryptophyceae

 
 
 
 
 
 

References

  1. ↑ "Tracing back EFL gene evolution in the cryptomonads-haptophytes assemblage: separate origins of EFL genes in haptophytes, photosynthetic cryptomonads, and goniomonads". Gene 441 (1–2): 126–31. July 2009. doi:10.1016/j.gene.2008.05.010. PMID 18585873. 
  2. ↑ 2.0 2.1 Okamoto, N.; Chantangsi, C.; Horák, A.; Leander, B.; Keeling, P.; Stajich, J. E. (2009). Stajich, Jason E.. ed. "Molecular Phylogeny and Description of the Novel Katablepharid Roombia truncata gen. et sp. nov., and Establishment of the Hacrobia Taxon nov". PLOS ONE 4 (9): e7080. doi:10.1371/journal.pone.0007080. PMID 19759916. Bibcode: 2009PLoSO...4.7080O. 
  3. ↑ 3.0 3.1 3.2 3.3 Zhao, Sen; Burki, Fabien; Bråte, Jon; Keeling, Patrick J.; Klaveness, Dag; Shalchian-Tabrizi, Kamran (2012). "Collodictyon—An Ancient Lineage in the Tree of Eukaryotes". Molecular Biology and Evolution 29 (6): 1557–68. doi:10.1093/molbev/mss001. PMID 22319147. 
  4. ↑ "EUKARYOMONADAE". http://comenius.susqu.edu/biol/202/chromalveolata/eukaryomonadae/default.htm. 
  5. ↑ 5.0 5.1 Burki, F.; Okamoto, N.; Pombert, J.F.; Keeling, P.J. (2012). "The evolutionary history of haptophytes and cryptophytes: phylogenomic evidence for separate origins". Proc. Biol. Sci. 279 (1736): 2246–54. doi:10.1098/rspb.2011.2301. PMID 22298847. 
  6. ↑ "Extremely intron-rich genes in the alveolate ancestors inferred with a flexible maximum-likelihood approach". Mol. Biol. Evol. 25 (5): 903–11. May 2008. doi:10.1093/molbev/msn039. PMID 18296415. 
  7. ↑ "An exceptional horizontal gene transfer in plastids: gene replacement by a distant bacterial paralog and evidence that haptophyte and cryptophyte plastids are sisters". BMC Biol. 4: 31. 2006. doi:10.1186/1741-7007-4-31. PMID 16956407. 
  8. ↑ Aharon Oren; R. Thane Papke (1 July 2010). Molecular Phylogeny of Microorganisms. Horizon Scientific Press. pp. 190–. ISBN 978-1-904455-67-7. https://books.google.com/books?id=a5t9DYZ-wccC&pg=PA190. Retrieved 21 January 2011. 
  9. ↑ "Interrelationships of chromalveolates within a broadly sampled tree of photosynthetic protists". Mol. Phylogenet. Evol. 53 (1): 202–11. May 2009. doi:10.1016/j.ympev.2009.04.012. PMID 19398025. 
  10. ↑ Burki, F; Inagaki, Y; Bråte, J; Archibald, J; Keeling, P; Cavalier-Smith, T; Sakaguchi, M; Hashimoto, T et al. (2009). "Large-scale phylogenomic analyses reveal that two enigmatic protist lineages, Telonemia and Centroheliozoa, are related to photosynthetic chromalveolates." (Free full text). Genome Biology and Evolution 1: 231–8. doi:10.1093/gbe/evp022. PMID 20333193. 
  11. ↑ Baurain, Denis; Brinkmann, Henner; Petersen, Jörn; Rodríguez-Ezpeleta, Naiara; Stechmann, Alexandra; Demoulin, Vincent; Roger, Andrew J.; Burger, Gertraud et al. (2010), "Phylogenomic Evidence for Separate Acquisition of Plastids in Cryptophytes, Haptophytes, and Stramenopiles", Molecular Biology and Evolution 27 (7): 1698–1709, doi:10.1093/molbev/msq059, PMID 20194427 
  12. ↑ Burki, F; Kaplan, M; Tikhonenkov, DV; Zlatogursky, V; Minh, BQ; Radaykina, LV; Smirnov, A; Mylnikov, AP et al. (2016). "Untangling the early diversification of eukaryotes: a phylogenomic study of the evolutionary origins of Centrohelida, Haptophyta and Cryptista". Proc Biol Sci 283 (1823): 20152802. doi:10.1098/rspb.2015.2802. PMID 26817772. 
  13. ↑ Silar, Philippe (2016), "Protistes Eucaryotes: Origine, Evolution et Biologie des Microbes Eucaryotes", HAL Archives-ouvertes: 1–462, https://hal.archives-ouvertes.fr/hal-01263138 
  14. ↑ Ruggiero (2015), "Higher Level Classification of All Living Organisms", PLOS ONE 10 (4): e0119248, doi:10.1371/journal.pone.0119248, PMID 25923521, Bibcode: 2015PLoSO..1019248R 
  15. ↑ Cavalier-Smith, T.; Chao, E. E.; Lewis, R. (17 April 2018), "Multigene phylogeny and cell evolution of chromist infrakingdom Rhizaria: contrasting cell organisation of sister phyla Cercozoa and Retaria", Protoplasma 255 (5): 1517–1574, doi:10.1007/s00709-018-1241-1, PMID 29666938 

External links

Wikidata ☰ Q1044732 entry



Retrieved from "https://handwiki.org/wiki/index.php?title=Biology:Hacrobia&oldid=3502796"