Dictionary > Opisthomastigote

Opisthomastigote

Definition
noun, plural: opisthomastigotes
(protistology) The developmental stage or the morphological form in the lifecycle of trypanosomatids characterized by the presence of a flagellum located posterior of the nucleus, and passing through a groove in the cell body
Supplement
All trypanosomatids of the family Trypanosomatidae are regarded as parasitic and their distinctive feature is possessing a single flagellum arising from a kinetosome near which is located a kinetoplast.1 Trypanosomatids have different developmental stages or definitive forms. Members of this family have more than one form or undergo different developmental stages in their lifecycle. These are the amastigote, promastigote, epimastigote, trypomastigote, opisthomastigote, and choanomastigote.
The opisthomastigote is considered as an uncommon morphology or developmental stage. It is characterized by a cell form with a flagellum located posterior of the nucleus. This is different from the other forms with flagellum such as the promastigote, the epimastigote, and the trypomastigote. Compared to the other three forms with flagellum that is located anterior of the nucleus, the opisthomastigote form has a flagellum located posterior of the nucleus. Apart from it, the flagellum of the opisthomastigote is passing through a groove in the cell body. This form is observed in the members of the genus Herpetomonas.
Word origin: Greek ópisthen (behind, at the back) + Greek –mastig (whip)
Synonym(s):

  • herpetomonad (stage)

Compare:

  • amastigote
  • promastigote
  • epimastigote
  • trypomastigote
  • choanomastigote
  • See also:

    Reference(s):

    1 Cheng, T. (1986). General Parasitology. Burlington: Elsevier Science.


    You will also like...

    Pollution in Freshwater Ecosystems
    Pollution in Freshwater Ecosystems

    There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..

    The Human Physiology
    The Human Physiology

    Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

    Endemic Flora of New Zealand
    New Zealand’s Unique Flora

    If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

    Mātauranga Māori and Science Collaboration
    Mātauranga Māori and Science

    Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

    Circulation
    Circulation

    The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

    Independent Assortment and Crossing Over
    Independent Assortment and Crossing Over

    This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..