Amoebozoa

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Amoebozoa
Temporal range: Neoproterozoic–Recent [1]
Chaos carolinensis
Scientific classification
(unranked): Amoebozoa
Lühe, 1913 emend. Cavalier-Smith, 1998
Subphyla and Infraphyla

The Amoebozoa are a eukaryote phylum of Amoeba-like protozoa.[2] Most move by internal cytoplasmic flow. Their finger-like pseudopodia are characteristic.

Most are unicellular, and are common in soils and aquatic habitats, with some found as symbionts of other organisms, including several pathogens. The Amoebozoa also include the Myxozoan slime moulds, multinucleate or multicellular forms which produce spores and are usually visible to the unaided eye.[3]

The nutrition is usually by phagocytosis. The cell surrounds food particles, sealing them into vacuoles where they are digested and absorbed. When food is scarce, most species form cysts, which may be carried by air to other places. In slime moulds, these structures are called spores, and form on stalked structures called fruiting bodies or sporangia.

Most Amoebozoa lack flagella and more generally do not form microtubule-supported structures except during mitosis. However, flagella occur among some archamoebae, and many slime moulds produce biflagellate gametes.

A characteristic form is the model organism Dictyostelium discoideum.

References[change | change source]

  1. Porter, Susannah M. 2006. The Proterozoic fossil record of heterotrophic eukaryotes. In Xiao, Shuhai & Kaufman, Alan J. (eds) Neoproterozoic Geolobiology and Paleobiology 27, 1–21. Dordrecht: Springer. [1]
  2. Patterson, David J. 1999. The diversity of Eukaryotes. American Naturalist 154 (S4): S96–S124 [2].
  3. Schilde C. & Schaap P. 2013. The Amoebozoa. Methods Mol. Biol. 983, 1–15. [3]