Dictionary > Archamoebae

Archamoebae

Definition
noun
A taxonomic class in Phylum Amoebozoa characterized by the absence of mitochondria
Supplement
Archamoeba species belong to the Phylum Amoebozoa. The phylum includes protists often possessing pseudopods, which may be blunt, fingerlike, lobose, etc., and the cell’s cytoplasm being divided into endoplasm and ectoplasm. The endoplasm is a granular central mass whereas the ectoplasm is the clear, outer part of the cytoplasm. Most species of this phylum lack flagella. However, flagella do exist in most Archamoebae species, e.g. the giant amoeba Pelomyxa sp.. Apart from having flagella, the Archamoebae are distinguished by the lack of mitochondria.1 Because of this feature, the Archamoeba group is regarded as primitive. As such, the Greek arkhi- (meaning to begin) depicts the presumed antiquity of this group.
The Class Archamoeba includes the genera, Entamoeba, Endolimax, Mastigamoeba, Mastigella, Mastigina, Pelomyxa, and Phreatamoeba. Entamoeba histolytica is an important representative of this group since it is a human pathogen, causing amoebic dysentery (bloody diarrhea). Endolimax species are also found as parasites in the intestines of various animals. Endolimax nana, for instance, is a parasite living in the intestine of a human host.
Scientific classification:

  • Domain: Eukaryota
  • Phylum: Amoebozoa
  • Class: Archamoebae

See also:

  • amoeba
  • Entamoeba
  • Reference(s):

    1 Cavalier-Smith T (1991). “Archamoebae: the ancestral eukaryotes?”. BioSystems 25 (1-2): 25–38.


    You will also like...

    Consciousness and behavior
    Consciousness and Behavior

    Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

    Origins of Life on Earth
    Origins of Life on Earth

    Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

    Darwin's Finches - Natural Selection
    Darwin and Natural Selection

    This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

    squirrel
    Animal Water Regulation

    Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

    "Cronopio dentiacutus", a prehistoric mammal (an illustration)
    Mammalian Ancestors

    Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

    DNA molecule
    Genetic Control – On and Off Genes

    Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

    Related Articles...

    No related articles found

    See all Related Topics