Archamoebae

The Archamoebae are an important group of amoebae.[1] They are unusual among protists because they have no mitochondria.[2]

Archamoebae
File:Entamoeba histolytica.jpg
Entamoeba histolytica trophozoite
Scientific classification e
Unrecognized taxon (fix): Archamoebae
Families and orders
Synonyms
  • Karyoblastea Margulis & Schwartz 1982
  • Peloflagellatea Goodkov & Seravin 1991
  • Caryoblastea
  • Entamoebea Cavalier-Smith 1991
  • Rhizoflagellata Saville Kent 1880
  • Mastigamoebomonada Starobogatov & Seravin 1980

The group includes many genera which are internal parasites or commensals of animals: for example Entamoeba and Endolimax. Some are human pathogens, causing diseases such as amoebic dysentery. Other genera of archamoebae live in freshwater habitats, and have flagella. Most have a single nucleus and flagellum, but the giant amoeba Pelomyxa has many of each.

Analysis of 100 genes shows that the Archamoebae are part of the Amoebozoa which have lost their mitochondria. They are close relatives of the slime moulds. Parasitic and commensal forms like Entamoeba and Endolimax developed separately from free-living ancestors.[3]

References

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  2. Lua error in Module:Citation/CS1/Identifiers at line 630: attempt to index field 'known_free_doi_registrants_t' (a nil value).
  3. Bapteste E; Brinkmann H; Lee J.A. et al 2002. The analysis of 100 genes supports the grouping of three highly divergent amoebae: Dictyostelium, Entamoeba, and Mastigamoeba. Proc. Natl. Acad. Sci. U.S.A. 99 (3): 1414–9. PMID 11830664. [1][dead link]