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''Amoeba'' is a genus of single-celled amoeboid protists in the family Amoebidae. The type species of the genus is ''Amoeba proteus'', a common freshwater organism, widely studied in classrooms and laboratories. ==History and classification== The earliest record of an organism resembling ''Amoeba'' was produced in 1755 by August Johann Rösel von Rosenhof, who named his discovery "Der Kleine Proteus" ("The Little Proteus"), after Proteus, the shape-shifting sea-god of Greek Mythology.〔Rosenhof, R. (1755). ''Monatlich herausgegebene Insektenbelustigungen'', vol. 3, p. 621, ().〕 While Rösel's illustrations show a creature similar in appearance to the one now known as ''Amoeba proteus, ''his "little Proteus The term "Proteus animalcule" remained in use throughout the 18th and 19th centuries, as an informal name for any large, free-living amoeboid. In 1758, apparently without seeing Rösel's "Proteus" for himself, Carl Linnaeus included the organism in his own system of classification, under the name'' Volvox chaos''. However, because the name Volvox had already been applied to a genus of flagellate algae, he later changed the name to ''Chaos chaos''. In 1786, the Danish Naturalist Otto Müller described and illustrated a species he called ''Proteus diffluens'', which was probably the organism known today as ''Amoeba proteus.'' The genus ''Amiba, ''from the Greek ''amoibè (''ἀμοιβή), meaning "change", was erected in 1822 by Bory de Saint-Vincent.〔Bory de Saint-Vincent, J. B. G. M. "Essai d'une classification des animaux microscopiques." Agasse, Paris (1826).p. 28〕 In, 1830. the German naturalist C. G. Ehrenberg adopted this genus in his own classification of microscopic creatures, but changed the spelling to "''Amoeba''."〔Ehrenberg, Christian Gottfried. Organisation, systematik und geographisches verhältniss der infusionsthierchen: Zwei vorträge, in der Akademie der wissenschaften zu Berlin gehalten in den jahren 1828 und 1830. Druckerei der Königlichen akademie der wissenschaften, 1832. p. 59〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Amoeba (genus)」の詳細全文を読む スポンサード リンク
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