Loukozoa

Last updated

Loukozoa
Malawimonasms.jpg
Malawimonasms
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Clade: Discoba
Phylum: Loukozoa
Cavalier-Smith, 1999 [1]
Subgroups

Loukozoa (From Greek loukos: groove [1] ) is a proposed taxon used in some classifications of eukaryotes, consisting of the Metamonada and Malawimonadea. [2] Ancyromonads are closely related to this group, as sister of the entire group, or as sister of the Metamonada. Amorphea may have emerged in this grouping, specifically as sister of the Malawimonads. [3]

Originally, Loukozoa included Anaeromonadea and Jakobea. [1] In 2013, it consisted of three subphyla: Eolouka (Tsukubea and Jakobea), Metamonada and Neolouka ( Malawimonas ). [4] In 2018, Cavalier-Smith has removed Eolouka from Loukozoa, placing it instead in Discoba. [2] [5]

With the root of the Eukaryota likely close to or in Loukozoa or Discoba, these groupings are studied to give unique information on the first Eukaryotes. [6]

References

  1. 1 2 3 Cavalier-Smith, T. (1999). "Principles of protein and lipid targeting in secondary symbiogenesis: Euglenoid, dinoflagellate, and sporozoan plastid origins and the eukaryote family tree". The Journal of Eukaryotic Microbiology. 46 (4): 347–366. doi:10.1111/j.1550-7408.1999.tb04614.x. PMID   18092388. S2CID   22759799.
  2. 1 2 Cavalier-Smith, Thomas (2017). "Euglenoid pellicle morphogenesis and evolution in light of comparative ultrastructure and trypanosomatid biology: semi-conservative microtubule/strip duplication, strip shaping and transformation". European Journal of Protistology. 61 (Pt A): 137–179. doi: 10.1016/j.ejop.2017.09.002 . PMID   29073503.
  3. Lax, Gordon; Eglit, Yana; Eme, Laura; Bertrand, Erin M.; Roger, Andrew J.; Simpson, Alastair G. B. (2018-11-14). "Hemimastigophora is a novel supra-kingdom-level lineage of eukaryotes". Nature. 564 (7736): 410–414. Bibcode:2018Natur.564..410L. doi:10.1038/s41586-018-0708-8. ISSN   0028-0836. PMID   30429611. S2CID   205570993.
  4. Cavalier-Smith, Thomas (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.
  5. Cavalier-Smith, Thomas (2018-01-01). "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.
  6. Brown, Matthew W; Heiss, Aaron A; Kamikawa, Ryoma; Inagaki, Yuji; Yabuki, Akinori; Tice, Alexander K; Shiratori, Takashi; Ishida, Ken-Ichiro; Hashimoto, Tetsuo (2018-01-19). "Phylogenomics Places Orphan Protistan Lineages in a Novel Eukaryotic Super-Group". Genome Biology and Evolution. 10 (2): 427–433. doi:10.1093/gbe/evy014. ISSN   1759-6653. PMC   5793813 . PMID   29360967.