Which Platyhelminthes class is also known as Digenea?
Digenea (Gr. Dis – double, Genos – race) is a class of trematodes in the Platyhelminthes phylum, consisting of parasitic flatworms (known as flukes) with a syncytial tegument and, usually, two suckers, one ventral and one oral….
|Clade:||Digenea Carus, 1863|
Why is it called Digenea?
Additional hosts may be involved. The name “digenea” refers to the alternation of generations between sexually-reproducing adult and asexually reproducing larval stages. This contrasts with the Monogenea, which reproduce sexually only. Adults produce an egg.
What do you mean by Digenea?
[ dī-jē′nē-ə, dī′jə-nē′ə ] n. A subclass of parasitic flatworms characterized by a complex life cycle involving developmental stages in a mollusk intermediate host and an adult stage in a vertebrate and including all of the common flukes of humans and other mammals.
What are the classification of trematodes?
Trematodes are flatworms classified in the phylum Platyhelminthes, class Trematoda, subclass Digenea. In general, trematodes are dorso-ventrally flattened and leaflike in shape. Their bodies are covered with tegument, which is usually armed with scalelike spines. They have two suckers: one oral and one ventral.
What are flukes in humans?
Liver flukes are parasites that can infect humans and cause liver and bile duct disease. There are two families of liver flukes that cause disease in humans: Opisthorchiidae (which includes species of Clonorchis and Opisthorchis) and Fasciolidae (which includes species of Fasciola).
How do trematodes infect humans?
Foodborne trematodes cause infection in humans via the consumption of contaminated food (raw fish, crustaceans or vegetables). Infection can result in severe liver and lung disease and together these diseases are estimated to cause 2 million life years lost to disability and death worldwide every year.
Do Monogenea infect humans?
Significance to humans In the wild, the number of monogeneans living on an individual host is generally low, and infestations of these parasites do not usually cause disease.
What are the major differences among nematodes cestodes and trematodes?
Cestodes are tape-like and segmented in shape, have a head with suckers and possibly hooks, and lack a digestive tract. Trematodes are leaf-like and unsegmented, lack hooks entirely, and have an incomplete digestive tract.
Is Fasciola a monogenetic or Digenetic trematode?
An example of a typical fluke is Fasciola hepatica (Figure 7-1). Within this class are two subclasses, the subclass Monogenea (the monogenetic trematodes) and the class Digenea (the digenetic trematodes). Trematodes are dorsoventrally flattened, unsegmented, and leaflike.