Monogeneans are important pathogenic parasites of captured captive fishes and .. characteristic of the Class Monogenea, but do present an operculum that. members of the flatworm phylum Platyhelminthes, class Monogenea. Monogenea are small parasitic flatworms mainly found on skin or gills. Major Classes – will consider each in detail: 1. Class Trematoda a. Subclass Aspidobothrea b. Subclass Digenea. 2. Class Monogenea. 3. Class Cestoidea.

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Trematoda – Wikipedia

Fish diseases and parasites. The adult fluke lives in the bile passage in the liver of sheep, other ruminants, or even man. They differ in two main characteristics.

About 25, living species have been described.

The majority of the Monogenea are ectoparasitic externally parasitic on fish. Most are parasitic and have evolved various specialized attachment organs; the free living specimens have ventral cilia to aid in locomotion. International Journal for Parasitology 35 Keep Exploring Britannica Dog.

Other diseases are caused by members of the genus Choledocystus. Schistosomiasis also known as bilharzia, bilharziosis or snail fever is an example of a parasitic disease caused by one of the species of trematodes platyhelminth infection, or “flukes”a parasitic worm of the genus Schistosoma.


Retrieved 28 June These worms are bilaterally symmetrical, meaning that their two sides reflect each other. Monogenea are small parasitic flatworms mainly found on skin or gills of fish. Two other parasitic classes, the Monogenea and Cestodaare sister classes in the Neodermataa group of Rhabditophoran Platyhelminthes.

Flatworms – Class Turbellaria, Class Monogenea, Class Trematoda, Class Cestoidea

In salt water fish, Monogeneans can infect the skin and gills, resulting in irritations to the host. Like all ectoparasites, monogeneans have well-developed attachment structures.

As in other flatworms, there is no anusand waste material must be egested through the mouth. Paste the link into your website, email, or any other HTML document.

Planaria have no skeletal or respiratory systems. The pharynx connects, via a short oesophagusto one or two blind-ending caecawhich occupy most of the length of the body. Gills that are infected may appear swollen and pale.

In most trematodes, sperm cells travel through the uterus to reach the ootype, where fertilization occurs. Nearly all trematodes are parasites of mollusks and vertebrates.

There are a dozen orders in this class, most living in fish but two that use humans as hosts.

Views Read Edit View history. The Digeneathe majority of trematodes, are obligate parasites of both mollusks and vertebratesbut rarely occur in cartilaginous fish.

Your email address will be altered so spam harvesting bots can’t read it easily. This monofenea part of the male system varies considerably in structure between speciesbut may include sperm storage sacs and accessory glands, in addition to the copulatory organ, which is either eversible, and termed a cirrusor non-eversible, and termed a penis.


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In other projects Wikimedia Commons Wikispecies. The lobes to each side are sensory and also are equipped with glands to secrete an adhesive clasxe used in capturing prey. Content on this website is from high-quality, licensed material originally published in print form. The smaller Aspidogastreacomprising about speciesare obligate parasites of mollusks and may also infect turtles and fishincluding cartilaginous fish.

Monogenea – Wikipedia

They have no intermediate cllasse and are ectoparasitic on fish seldom in the urinary bladder and rectum of cold-blooded vertebrates.

Trematoda is a class within the phylum Platyhelminthes. Cows and pigs can act as the intermediate host to Taenia sp. About 50 families and thousands of species are described.

The Trematoda are endoparasitic with a complicated life-cycle. However, trematodes can be found anywhere where untreated human waste is used as fertilizer.