Pelomyxa
Scientific classification
Domain: Eukaryota Phylum: Amoebozoa Class: Archamoebae Genus: Pelomyxa Greef 1874

Pelomyxa are giant amoebae, usually 500-800 μm but occasionally up to 5 mm in length. The most 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. Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... Kingdoms Eukaryotes are organisms with complex cells, in which the genetic material is organized into membrane-bound nuclei. ... Subgroups Mycetozoa(slime moulds) Archamoebae    Pelobiontida    Entamoebida Gymnamoebia Various others The Amoebozoa are a major group of amoeboid protozoa, including the majority that move by means of internal cytoplasmic flow. ... Genera Endolimax Entamoeba Mastigamoeba Mastigella Mastigina Pelomyxa Phreatamoeba The Archamoebae are a group of Amoebozoa distinguished by the absence of mitochondria. ... Subgroups Mycetozoa(slime moulds) Archamoebae    Pelobiontida    Entamoebida Gymnamoebia Various others The Amoebozoa are a major group of amoeboid protozoa, including the majority that move by means of internal cytoplasmic flow. ... A micrometre (American spelling: micrometer, symbol µm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the size of a droplet of mist or fog. ... Chaos is a genus of giant amoebae, varying from 1-5 mm in length. ...

Pelomyxa have anywhere from two to several hundred nuclei. A moving cell is cylindrical in shape, with a single hemispherical pseudopod at the front and a semipermanent projection called a uroid at the back, which is covered in tiny non-motile flagella. They consume a wide variety of food, and have many vacuoles containing whatever particles that happen across, both food such as diatoms and debris such as sand. The eukaryotic cell nucleus. ... Pseudopods or pseudopodia (false feet) are temporary projections of eukaryotic cells. ... A flagellum (plural, flagella) is a whip-like organelle that many unicellular organisms, and some multicellular ones, use to move about. ... Schematic of typical animal cell, showing subcellular components. ... Diatoms (Greek: (dia) = through + (temnein) = to cut, i. ...

This is one of several genera of amoebae that lack mitochondria. As such it has been considered as possibly one of the most primitive eukaryotes, and given its own phylum (Pelobionta or Caryoblastea). However the absence is now known to be secondary. It is grouped with the other amitochondriate genera as the Archamoebae, which are now placed among the Amoebozoa. Electron micrograph of a mitochondrion showing its mitochondrial matrix and membranes In cell biology, a mitochondrion (plural mitochondria) (from Greek μιτος or mitos, thread + κουδριον or khondrion, granule) is a membrane-enclosed organelle, found in most eukaryotic cells. ... Kingdoms Animalia - Animals Fungi Plantae - Plants Protista Animals, plants, fungi, and protists are eukaryotes (IPA: ), organisms with a complex cell or cells, in which the genetic material is organized into a membrane-bound nucleus or nuclei. ... Genera Endolimax Entamoeba Mastigamoeba Mastigella Mastigina Pelomyxa Phreatamoeba The Archamoebae are a group of Amoebozoa distinguished by the absence of mitochondria. ... Subgroups Mycetozoa(slime moulds) Archamoebae    Pelobiontida    Entamoebida Gymnamoebia Various others The Amoebozoa are a major group of amoeboid protozoa, including the majority that move by means of internal cytoplasmic flow. ...