Pelomyxa are giant amoebae, usually 500-800 μm but occasionally up to 5 mm in length. One notable species is P. palustris; other described species may be synonyms, or have been moved to the unrelated genus Chaos. They are found in mud at the bottom of freshwater streams. Characteristics Pelomyxa have multiple nuclei, which can number from two to several thousand in rare cases. A moving cell is cylindrical in shape, with a single hemispherical pseudopod at the front and a semipermanent proj… (More on Pelomyxa)