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Clockwise from top right: Amoeba proteus, Actinophrys sol, Acanthamoeba sp., Nuclearia thermophila., Euglypha acanthophora, neutrophil ingesting bacteria. An amoeba (/ ə ˈ m iː b ə /; less commonly spelled ameba or amœba; pl.: amoebas (less commonly, amebas) or amoebae (amebae) / ə ˈ m iː b i /), [1] often called an amoeboid, is a type of cell or unicellular organism with the ability ...
Difflugia is the largest genus of Arcellinida, one of several groups of Tubulinea within the eukaryote supergroup Amoebozoa. [1] Arcellinida species produce shells or tests from mineral particles or biogenic elements (e.g. diatom frustules) and are thus commonly referred to as testate amoebae or shelled amoebae.
Amoeba (sometimes amœba or ameba, plural amoebae, amoebas or amebas) is a type of cell or organism which has the ability to alter its shape, primarily by extending and retracting pseudopods. Amoeba or variants may also refer to:
E. thermarum as an example of adaptation to extreme environments [2] suggests that the evolution of thermophily in amoebae has occurred across multiple distantly related lineages, indicating that the amoeboid form may be particularly well-suited for high-temperature environments.
An amoeba of the genus Mayorella (Amoebozoa, Discosea). Amoebozoa is a large and diverse group, but certain features are common to many of its members. The amoebozoan cell is typically divided into a granular central mass, called endoplasm, and a clear outer layer, called ectoplasm.
Breviatea, commonly known as breviate amoebae, [3] are a group of free-living, amitochondriate protists with uncertain phylogenetic position. [4] They are biflagellate, and can live in anaerobic (oxygen-free) environments. [4] [3] [5] They are currently placed in the Obazoa clade. [6] They likely do not possess vinculin proteins. [6]
Protosteloid amoebae, also called protostelids, are amoebae that are capable of making simple fruiting bodies consisting of a cellular stalk topped by one or a few spores. [8] All species are microscopic and are typically found on dead plant matter where they consume bacteria , yeasts , and fungal spores.
This class was anticipated by some biologists such as Jahn, who grouped all amoebae with granular pseudopodia together, [1] but most split the lobose amoebae into testate Testacealobosia and naked Gymnamoebia. These latter are polyphyletic, but molecular trees by Bolivar et al. [2] identified a core monophyletic subgroup.