Rhizamoeba (rye-sa-me-ba), a free-living naked amoeba which may adopt a variety of body forms from limax (slug-like) to more or less discoidal, to an extended fan-shape as here. Margins of the cell give rise to irregular thin pseudopodia. Nuclei round with central nucleolus. Phase contrast. This picture was taken by David Patterson, Linda Amaral Zettler, Mike Peglar and Tom Nerad from cultures and other materials maintained at the American Type Culture Collection during 2001. Image copyright: D. J. Patterson, L Amaral-Zettler, M. Peglar and T. Nerad, image used under license to MBL (micro*scope).
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From the collection
American Type Culture Collection
|Description of Rhizamoeba: Limax-like in rapid motion, often eruptive. Anterior with a hyaline zone, posterior usually with conspicuous trailing filaments. Less active forms are flattened, sometimes with peripheral filaments. Most uninucleate, but some species multinucleate. Nucleus difficult to observe in living cells. Marine, freshwater and soil species; some form cysts. Type species: R. polyura Page, 1972. |