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Found in every major protist lineage. Amoeboid cells occur among the protozoans, ... Some protists can move toward or away from a stimulus, ...
Amoeboid movement is the most typical mode of locomotion in adherent eukaryotic cells. [1] It is a crawling-like type of movement accomplished by protrusion of cytoplasm of the cell involving the formation of pseudopodia ("false-feet") and posterior uropods .
Amoebozoa is a major taxonomic group containing about 2,400 described species of amoeboid protists, [8] often possessing blunt, fingerlike, lobose pseudopods and tubular mitochondrial cristae. [ 7 ] [ 9 ] In traditional classification schemes, Amoebozoa is usually ranked as a phylum within either the kingdom Protista [ 10 ] or the kingdom ...
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 ...
The protist can exist in two different forms: flagellate and amoeboid. It is the only known species of cutosean amoebas having both forms, [8] as all other cutoseans are non-flagellated. [9] As a flagellate, it projects out a single flagellum of about 30 μm long from the basal body and lives as a free swimmer in water. [1]
The amoeboflagellate phenotype is present in numerous protists that have a crucial phylogenetic position near the origin of animals and fungi, within the vast clade known as Opisthokonta. It has been described in choanoflagellates such as Salpingoeca , filastereans such as Pigoraptor , and even some early-branching fungi such as Sanchytrium ...
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Until quite recently, the genus Chaos was included, along with all other protists that extend lobose pseudopods or move about by protoplasmic flow, in the phylum Sarcodina. [17] Molecular phylogenies based on the examination of ribosomal DNA , have shown that Sarcodina is a polyphyletic grouping: that some amoeboids shared a more recent common ...