„Hacrobia“ – Versionsunterschied

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[[Category:Hacrobia|*]]
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{{Hacrobia-stub}}

Version vom 27. November 2018, 14:17 Uhr

Vorlage:Automatic taxobox

The cryptomonads-haptophytes assemblage is a proposed 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]

Vorlage:As of, 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

Vorlage:Further information 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] Vorlage:As of, 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]

Vorlage:Clade

References

Vorlage:Reflist

Wikispecies: Hacrobia – Artenverzeichnis

Vorlage:Eukaryota classification Vorlage:Cryptophyta and haptophyta Vorlage:Taxonbar

  1. ↑ Sakaguchi M, Takishita K, Matsumoto T, Hashimoto T, Inagaki Y: Tracing back EFL gene evolution in the cryptomonads-haptophytes assemblage: separate origins of EFL genes in haptophytes, photosynthetic cryptomonads, and goniomonads. In: Gene. 441. Jahrgang, Nr. 1–2, Juli 2009, S. 126–31, doi:10.1016/j.gene.2008.05.010, PMID 18585873 (elsevier.com).
  2. ↑ a b N. Okamoto, C. Chantangsi, A. Horák, B. Leander, P. Keeling, J. E. Stajich: Molecular Phylogeny and Description of the Novel Katablepharid Roombia truncata gen. et sp. nov., and Establishment of the Hacrobia Taxon nov. In: PLoS ONE. 4. Jahrgang, Nr. 9, 2009, S. e7080, doi:10.1371/journal.pone.0007080, PMID 19759916, PMC 2741603 (freier Volltext), bibcode:2009PLoSO...4.7080O.
  3. ↑ a b c d Sen Zhao, Fabien Burki, Jon Bråte, Patrick J. Keeling, Dag Klaveness, Kamran Shalchian-Tabrizi: Collodictyon—An Ancient Lineage in the Tree of Eukaryotes. In: Molecular Biology and Evolution. 29. Jahrgang, Nr. 6, 2012, S. 1557–68, doi:10.1093/molbev/mss001, PMID 22319147, PMC 3351787 (freier Volltext).
  4. ↑ EUKARYOMONADAE. Abgerufen am 1. März 2015.
  5. ↑ a b F. Burki, N. Okamoto, J.F. Pombert, P.J. Keeling: The evolutionary history of haptophytes and cryptophytes: phylogenomic evidence for separate origins. In: Proc. Biol. Sci. 279. Jahrgang, 2012, S. 2246–54, doi:10.1098/rspb.2011.2301, PMID 22298847, PMC 3321700 (freier Volltext).
  6. ↑ Csurös M, Rogozin IB, Koonin EV: Extremely intron-rich genes in the alveolate ancestors inferred with a flexible maximum-likelihood approach. In: Mol. Biol. Evol. 25. Jahrgang, Nr. 5, Mai 2008, S. 903–11, doi:10.1093/molbev/msn039, PMID 18296415 (oxfordjournals.org).
  7. ↑ Rice DW, Palmer JD: An exceptional horizontal gene transfer in plastids: gene replacement by a distant bacterial paralog and evidence that haptophyte and cryptophyte plastids are sisters. In: BMC Biol. 4. Jahrgang, 2006, S. 31, doi:10.1186/1741-7007-4-31, PMID 16956407, PMC 1570145 (freier Volltext) – (biomedcentral.com).
  8. ↑ Aharon Oren, R. Thane Papke: Molecular Phylogeny of Microorganisms. Horizon Scientific Press, 2010, ISBN 978-1-904455-67-7, S. 190– (google.com [abgerufen am 21. Januar 2011]).
  9. ↑ Reeb VC, Peglar MT, Yoon HS, etal: Interrelationships of chromalveolates within a broadly sampled tree of photosynthetic protists. In: Mol. Phylogenet. Evol. 53. Jahrgang, Nr. 1, Mai 2009, S. 202–11, doi:10.1016/j.ympev.2009.04.012, PMID 19398025 (elsevier.com).
  10. ↑ Burki, F, Inagaki, Y, Bråte, J, Archibald, J., Keeling, P., Cavalier-Smith, T, Sakaguchi, M, Hashimoto, T, Horak, A: Large-scale phylogenomic analyses reveal that two enigmatic protist lineages, Telonemia and Centroheliozoa, are related to photosynthetic chromalveolates. In: Genome Biology and Evolution. 1. Jahrgang, 2009, S. 231–8, doi:10.1093/gbe/evp022, PMID 20333193, PMC 2817417 (freier Volltext) – (gbe.oxfordjournals.org (Memento des Originals vom 10. Juli 2012 im Webarchiv archive.today) [FREE FULL TEXT]).
  11. ↑ Vorlage:Citation
  12. ↑ F Burki, M Kaplan, DV Tikhonenkov, V Zlatogursky, BQ Minh, LV Radaykina, A Smirnov, AP Mylnikov, PJ Keeling: Untangling the early diversification of eukaryotes: a phylogenomic study of the evolutionary origins of Centrohelida, Haptophyta and Cryptista. In: Proc Biol Sci. 1823. Jahrgang, 2016, S. 20152802, doi:10.1098/rspb.2015.2802, PMID 26817772, PMC 4795036 (freier Volltext).
  13. ↑ Vorlage:Citation
  14. ↑ Vorlage:Citation
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