Orthokaryotes

Proposed clade of eukaryotic organisms

Orthokaryotes

Aulacantha, a Radiolarian
Scientific classification
Domain:	Eukaryota
Clade:	Orthokaryotes
Clades
Jakobea Neokaryotes

The Orthokaryotes (Cavalier-Smith 2017) are a proposed Eukaryote clade consisting of the Jakobea and the Neokaryotes.^[1] Together with its sister Discicristata it forms a basal Eukaryote clade. They are characterized by stacked Golgi, orthogonal centrioles, and two opposite posterior ciliary roots.

Taxonomy

A proposed cladogram is^[2]^[3]^[4]^[5]^[6]^[7]^[8]^[9]^[1]

Eukaryota

Tsukubea

Discicristata

	Euglenozoa

	Percolozoa

Orthokaryotes

Jakobea

Neokaryotes

Corticata/Diaphoretickes/

Archaeplastida

Chromista

	Hacrobia

	SAR

Bikont

Scotokaryotes/Opimoda/Neozoa

	Mantamonadida

	Diphyllatea

Amorphea/

Amoebozoa

Obazoa

	Breviata

	Apusomonadida

Opisthokonta/Choanozoa

Unikont

Sarcomastigota

References

^ ^a ^b Cavalier-Smith, Thomas (5 September 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. ISSN 0033-183X. PMC 5756292. PMID 28875267.
^ Zaremba-Niedzwiedzka, Katarzyna; Caceres, Eva F.; Saw, Jimmy H.; Bäckström, Disa; Juzokaite, Lina; Vancaester, Emmelien; Seitz, Kiley W.; Anantharaman, Karthik; Starnawski, Piotr (11 January 2017). "Asgard archaea illuminate the origin of eukaryotic cellular complexity" (PDF). Nature. advance online publication (7637): 353–358. Bibcode:2017Natur.541..353Z. doi:10.1038/nature21031. ISSN 1476-4687. OSTI 1580084. PMID 28077874. S2CID 4458094.
^ Derelle, Romain; Torruella, Guifré; Klimeš, Vladimír; Brinkmann, Henner; Kim, Eunsoo; Vlček, Čestmír; Lang, B. Franz; Eliáš, Marek (17 February 2015). "Bacterial proteins pinpoint a single eukaryotic root". Proceedings of the National Academy of Sciences. 112 (7): E693–E699. Bibcode:2015PNAS..112E.693D. doi:10.1073/pnas.1420657112. ISSN 0027-8424. PMC 4343179. PMID 25646484.
^ Cavalier-Smith, T.; Chao, E. E.; Snell, E. A.; Berney, C.; Fiore-Donno, A. M.; Lewis, R. (2014). "Multigene eukaryote phylogeny reveals the likely protozoan ancestors of opisthokonts (animals, fungi, choanozoans) and Amoebozoa". Molecular Phylogenetics & Evolution. 81: 71–85. Bibcode:2014MolPE..81...71C. doi:10.1016/j.ympev.2014.08.012. PMID 25152275.
^ Cavalier-Smith, Thomas (23 June 2010). "Kingdoms Protozoa and Chromista and the eozoan root of the eukaryotic tree". Biology Letters. 6 (3): 342–345. doi:10.1098/rsbl.2009.0948. ISSN 1744-9561. PMC 2880060. PMID 20031978.
^ He, Ding; Fiz-Palacios, Omar; Fu, Cheng-Jie; Fehling, Johanna; Tsai, Chun-Chieh; Baldauf, Sandra L. (2014). "An Alternative Root for the Eukaryote Tree of Life". Current Biology. 24 (4): 465–470. Bibcode:2014CBio...24..465H. doi:10.1016/j.cub.2014.01.036. PMID 24508168.
^ Cavelier Smith (2013). "Early evolution of eukaryote feeding modes, cell structural diversity, and classification of the protozoan phyla Loukozoa, Sulcozoa, and Choanozoa". European Journal of Protistology. 49 (2): 115–178. doi:10.1016/j.ejop.2012.06.001. PMID 23085100.
^ Hug, Laura A.; Baker, Brett J.; Anantharaman, Karthik; Brown, Christopher T.; Probst, Alexander J.; Castelle, Cindy J.; Butterfield, Cristina N.; Hernsdorf, Alex W.; Amano, Yuki (11 April 2016). "A new view of the tree of life". Nature Microbiology. 1 (5): 16048. doi:10.1038/nmicrobiol.2016.48. ISSN 2058-5276. PMID 27572647.
^ Cavalier-Smith, Thomas; Chao, Ema E.; Lewis, Rhodri (1 June 2016). "187-gene phylogeny of protozoan phylum Amoebozoa reveals a new class (Cutosea) of deep-branching, ultrastructurally unique, enveloped marine Lobosa and clarifies amoeba evolution". Molecular Phylogenetics and Evolution. 99: 275–296. Bibcode:2016MolPE..99..275C. doi:10.1016/j.ympev.2016.03.023. PMID 27001604.