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Hatena arenicola
''Hatena arenicola'' is a species of single-celled eukaryotes discovered in 2000, and first reported in 2005, It was discovered by Japanese biologists Noriko Okamoto and Isao Inouye at the
University of Tsukuba, and they gave the scientific description and formal name in 2006. The species is a flagellate, and can resemble a plant at one stage of its life, in which it carries a photosynthesizing alga inside itself, or an animal, acting as predator in another stage of its life. Researchers believe that this organism is in the process of secondary endosymbiosis, in which one organism is incorporated into another, resulting in a completely new life form.
== Discovery ==
''H. arenicola'' was first noticed as algal bloom in 2000 from Isonoura beach in Japan. It was found in the area of moderately sheltered sandy shore, where a number of algae surfaced during tidal waves. The specimens were present in the upper edge of the seepage face. It can be found throughout the year, except in winter. It was originally believed to be a new green alga. However, it was discovered that the chlorophyll-bearing plastids were independent of the cell division, indicating that they were separate but temporary endosymbiotic organisms.
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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