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Scientific classification
Domain: Eukaryota
(unranked): Amoebozoa
Class: Tubulinea
Order: Tubulinida
Family: Amoebidae
Genus: Polychaos
Schaeffer, 1926[1]

Polychaos is an amoeboid genus in the Amoebozoa group.[2] Several characters unite the species in this genus. The pseudopods meld at their bases when the organism is moving, and have dorsal, longitudinal ridges. The nucleus is oval or ellipsoid.[3]


Polychaos includes the following species:[3]

  • Polychaos dubium (Schaeffer, 1916) (type species)
  • Polychaos fasciculatum (Penard, 1902)
  • Polychaos timidum Bovee, 1972
  • Polychaos nitidubium Bovee, 1970


  1. ^ Schaeffer, Asa Arthur (1926a). "Taxonomy of the amebas, with descriptions of thirty-nine new marine and freshwater species". Papers from the Department of Marine Biology of the Carnegie Institution of Washington. 24: 115 pp. 12 plates. 
  2. ^ "The Amoebae". Retrieved 2009-06-25. 
  3. ^ a b Lee, J.J., Hutner, S.H. & Bovee, E.C., eds. (1985). Illustrated Guide to the Protozoa. Lawrence, Kansas: Society of Protozoologists. pp. ix + 630 pages.