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Jakobid

Jakobid
Four jakobid species, showing groove and flagella: Jakoba libera (ventral view), Stygiella incarcerata (ventral view), Reclinomonas americana (dorsal view), and Histiona aroides (ventral view)
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diphoda
Clade: Discoba
Class: Jakobea
Cavalier-Smith 1997[1] em. 2003[2]
Order: Jakobida
Cavalier-Smith 1993
Families
Synonyms
  • Jacobidea Cavalier-Smith 1993

Jakobids are an order of free-living, heterotrophic, flagellar eukaryotes in the supergroup Excavata. They are small (less than 15 μm), and can be found in aerobic and anaerobic environments.[3][4][5] The order Jakobida, believed to be monophyletic, consists of only twenty species at present, and was classified as a group in 1993.[3][5][6] There is ongoing research into the mitochondrial genomes of Jakobids, which are unusually large and bacteria-like, evidence that Jakobids may be important to the evolutionary history of eukaryotes.[4][7]

Molecular phylogenetic evidence suggests strongly that Jakobids are most closely related to Heterolobosea (Percolozoa) and Euglenozoa.[8]

  1. ^ Cavalier-Smith T (1997). "Amoeboflagellates and Mitochondrial Cristae in Eukaryote Evolution: Megasystematics of the New Protozoan Subkingdoms Eozoa and Neozoa". Archiv für Protistenkunde. 147: 237–258.
  2. ^ Cavalier-Smith T (2003). "The excavate protozoan phyla Metamonada Grassé emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa". International Journal of Systematic and Evolutionary Microbiology. 53: 1741–1758. doi:10.1099/ijs.0.02548-0.
  3. ^ a b O'Kelly, Charles J. (1993). "The Jakobid flagellates: structural features of Jakoba, Reclinomonas, and Histonia and implications for the early diversification of eukaryotes". Journal of Eukaryotic Microbiology. 40 (5): 627–636. doi:10.1111/j.1550-7408.1993.tb06120.x. S2CID 85938682.
  4. ^ a b Strassert, Jürgen F. H.; Tikhonenov, Denis V.; Pombert, Jean-François; Kolisko, Martin; Tai, Vera; Mylnikov, Alexander P.; Keeling, Patrick J. (2016). "Moramonas marocensis gen. nov., sp. nov.: a jakobid flagellate isolated from desert soil with a bacteria-like, but bloated mitochondrial genome". Open Biology. 6 (2): 150239. doi:10.1098/rsob.150239. PMC 4772810. PMID 26887409.
  5. ^ a b Burger, Gertraud; Gray, Michael W.; Forget, Lise; Lang, B. Franz (2013). "Strikingly Bacteria-Like and Gene-Rich Mitochondrial Genomes throughout Jakobid Protists". Genome Biology and Evolution. 5 (2): 418–438. doi:10.1093/gbe/evt008. PMC 3590771. PMID 23335123.
  6. ^ Simpson, Alastair G. B. (2017). "Jakobids". In Archibald, John M.; Simpson, Alastair G. B.; Slamovits, Claudio H. (eds.). Handbook of the Protists. Springer, Cham. pp. 973–1003. doi:10.1007/978-3-319-28149-0_6. ISBN 978-3-319-28147-6.
  7. ^ Lara, Enrique; Chatzinotas, Antonis; Simpson, Alastair G. B. (2006). "Andalucia (n. gen.)—the Deepest Branch Within Jakobids (Jakobida; Excavata), Based on Morphological and Molecular Study of a New Flagellate from Soil". Journal of Eukaryotic Microbiology. 53 (2): 112–120. doi:10.1111/j.1550-7408.2005.00081.x. PMID 16579813. S2CID 19092265.
  8. ^ Hampl V, Hug L, Leigh JW, Dacks JB, Lang BF, Simpson AG, Roger AJ (February 2009). "Phylogenomic analyses support the monophyly of Excavata and resolve relationships among eukaryotic "supergroups"". Proc. Natl. Acad. Sci. U.S.A. 106 (10): 3859–64. Bibcode:2009PNAS..106.3859H. doi:10.1073/pnas.0807880106. PMC 2656170. PMID 19237557.

Jakobid

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