Loukozoa

Proposed taxon

Loukozoa
Malawimonasms
Scientific classification Edit this classification
Domain: Eukaryota
Superphylum: Eozoa
Phylum: Loukozoa
Cavalier-Smith, 1999[1]
Subgroups
  • Neolouka/Malawimonadea
  • Metamonada
  • Ancyromonadida?

Loukozoa (+ Ancyromonads) (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] Cavalier-Smith has recently 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. ^ a b c 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. ^ a b 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.
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Eukaryote classification
Domain
Archaea
Bacteria
Eukaryota
(major groups
Excavata
Diaphoretickes
Hacrobia
Rhizaria
Alveolata
Stramenopiles
Plants
Amorphea
Amoebozoa
Opisthokonta
Animals
Fungi)
Amorphea
Amoebozoa
   Obazoa   
Opisthokonta
Holomycota
   Holozoa   
Filozoa
Choanozoa
Diaphoretickes
Haptista
    TSAR    
     SAR     
Rhizaria
Alveolata
Myzozoa
Stramenopiles
Bigyra
Gyrista
     CAM     
Pan-Cryptista
Cryptista
Archaeplastida
Viridiplantae
(Plants sensu lato)
Streptophyta
Excavates*
Discoba
Discicristata
Metamonada
Malawimonada
Incertae sedis
Hemimastigophora
Ancyromonadida
  • Ancyromonadidae
  • Planomonadidae
CRuMs
  • ¹traditional kingdoms excluded from protists
  • *paraphyletic groups
  • bold denotes groups with over 1,000 species
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Domain
Archaea
Bacteria
Eukaryota
(major groups
Excavata
Diaphoretickes
Hacrobia
Rhizaria
Alveolata
Stramenopiles
Plants
Amorphea
Amoebozoa
Opisthokonta
Animals
Fungi)
Jakobida
Jakobea
Jakobida
Tsukubamonada
Tsukubea
Tsukubamonadida
Pharyngomonada
Pharyngomonadidea
  • Pharyngomonadida
    • Pharyngomonadidae
Tetramitia
Lunosea
  • Selenaionida
    • Selenaionidae
Neovahlkampfiea
Eutetramitia
Lyromonadea
  • Lyromonadida
    • Gruberellidae
    • Paravahlkampfiidae
    • Plaesiobystridae
    • Psalteriomonadidae
Heterolobosea
Postgaardia
Postgaardea
Glycomonada
Diplonemea
Kinetoplastea
  • Bordnamonadidae
  • Trypanophididae
Prokinetoplastina
  • Prokinetoplastida
    • Ichthyobodonidae
    • Perkinselidae
Metakinetoplastina
Euglenida
Petalomonadea
  • Petalomonadida
    • Petalomonadidae
    • Sphenomonadidae
Alistosa
  • Decastavida
    • Decastavidae
    • Keelungiidae
    • Lentomonadidae
  • Heterostavida
    • Sphenomonadidae
  • Ploeotiida
    • Sphenomonadidae
Entosiphonea
  • Entosiphonida
    • Entosiphonidae
Karavia
Spirocuta
Anisonemea
Peranemea
Euglenophyceae
Loukozoa
Neolouka
Malawimonadea
Malawimonadida
Planomonada
Planomonadea
Ancyromonadida
  • Ancyromonadidae
  • Planomonadidae
Anaeromonada
Anaeromonadea
  • Paratrimastigida
    • Paratrimastigidae
  • Trimastigida
  • Oxymonadida
    • Oxymonadidae
    • Polymastigidae
    • Pyrsonymphidae
    • Saccinobaculidae
    • Streblomastigidae
Fornicata
  • Kipferliidae
Carpediemonadea
Eopharyngia
Parabasalia
Trichonymphea
  • Trichonymphida
    • †Burmanymphidae
    • Hoplonymphidae
    • Spirotrichosomidae
    • Staurojoeninidae
    • Teratonymphidae
    • Trichonymphidae
Trichomonadea
  • Hexamastigidae
  • Cristamonadida
    • Calonymphidae
    • Devescovinidae
  • Hypotrichomonadida
    • Hypotrichomonadidae
  • Spirotrichonymphida
    • Spirotrichonymphidae
  • Trichomonadida
  • Tritrichomonadida
    • Dientamoebidae
    • Monocercomonadidae
    • Simplicimonadidae
    • Tritrichomonadidae
Taxon identifiers
Loukozoa


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