Volvox proteusPallas, 1766
This small protozoan uses tentacular protuberances called pseudopodia to move and phagocytose smaller unicellular organisms,(which may be greater in size than of amoeba), which are enveloped inside the cell's cytoplasm in a food vacuole, where they are slowly broken down by enzymes. Amoeba proteus is very well known for its extending pseudopodia. It occupies freshwater environments and feeds on other protozoans, algae, rotifers, and even other smaller amoebae. Due to phytochromes, A. proteus may appear in a variety of colors (often yellow, green and purple) under a microscope.
The first description of an amoeba that may have been A. proteus was in 1755, when August Johann Rösel von Rosenhof published drawings of an amoeboid protozoan he called the "little Proteus". From there, various authors assigned Rösel's organism and other amoeboid protozoa various names: Carl Linnaeus termed Rösel's organism Chaos protheus in 1758. Otto Friedrich Müller referred to it as Proteus diffluens in 1786. In 1878, Joseph Leidy proposed the current name Amoeba proteus to describe Rösel's Proteus, Proteus diffluens, and another described amoeba Amoeba princeps.
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- Lorch J (1973). "Some Historical Aspects of Amoeba Studies". In Jeon K (ed.). The Biology of Amoeba (1 ed.). ISBN 9780323144049.
- Joseph Leidy (1878). "Amoeba proteus". The American Naturalist. 12 (4): 235–238. doi:10.1086/272082.
- Hofstatter PG, Brown MW, Lahr DJ (November 2018). "Comparative Genomics Supports Sex and Meiosis in Diverse Amoebozoa". Genome Biol Evol. 10 (11): 3118–3128. doi:10.1093/gbe/evy241. PMC 6263441. PMID 30380054.
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