Dictionary > Trematoda

Trematoda

Definition
noun
(taxonomy) A class of the Phylum Platyhelminthes that is comprised of parasitic flukes
Supplement
The phylum Platyhelminthes (flatworms) is comprised of parasitic worms characterized mainly by their flattened, bilaterally symmetrical body. This phylum includes the four classes: (1) Turbellaria, (2) Trematoda, (3) Monogenea, and (4) Cestoda. The Class Trematoda includes species (approximately 24,000 species1) that live as obligate parasites (or endoparasites). Most of them require two hosts to complete their life cycle. The class is divided into two sublasses: Digenea and Aspidogastrea. Digenea is the larger subclass and is comprised of parasitic species of both mollusk and vertebrate hosts. Aspidogastrea is a smaller subclass and includes trematode species (about 100 species) that live as obligate parasites of mollusks but may also infect vertebrates (e.g. turtles and fish). Monogenea is a former subclass of trematode but is now regarded as a distinct class of the phylum Platyhelminthes.
Species of the Class Trematoda are also commonly called as flukes. Medically important species include Schistosoma, Clonorchis, Opisthorchis, Fasciola, and Paragonimus species; they are capable of infecting (or infesting) humans. The digenetic trematodes are the only ones found in man.
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Platyhelminthes
  • Class: Trematoda Rudolphi, 1808

See also:

  • trematode
  • flatworm
  • Reference(s):

    1 Poulin, R. & Morand, S. (2005). Parasite Biodiversity. Smithsonian. p. 216.


    You will also like...

    IQ, Creativity and Learning
    IQ, Creativity and Learning

    Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

    Chromosome Mutations
    Chromosome Mutations

    Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

    Young plant growing from the soil.
    Soils

    Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Photosynthesis and respiration
    Plant Metabolism

    Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

    Freshwater aquatic plankton
    Freshwater Communities & Plankton

    Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..