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Arcellinida
Arcellinid testate amoebae or Arcellinida,〔http://www.microscopy-uk.org.uk/mag/artjun03/gsamoebae.html Testate amoebae, peat bogs and past climates. accessed 16 march 2007〕 Arcellacean〔(Identification key for holocene lacustrine arcellacean (thecamoebian) taxa )〕 or lobose testate amoebae are single-celled protists partially enclosed in a simple test (shell).
Arcellinid testate amoebae are commonly found in soils, leaf litter, peat bogs and near/in fresh water.〔 They use their pseudopodia (false feet), a temporary cell extension, for moving and taking in food. Like most amoebae, they are generally believed to reproduce asexually via binary fission. However a recent review suggests that sexual recombination may be the rule rather than the exception in amoeboid protists in general, including the Arcellinid testate amoebae.
==Test or shell==
Simple tests (or shells) are made by either secretion (autogenous tests) or by the agglutination of foreign material (xenogenous tests), or sometimes a combination of both. Past environmental changes can be determined by analysing the composition of fossil tests, including the reconstruction of past climate change.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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