In all species the adults have complex reproductive systems, capable of producing between 10,000 and 100,000 times as many eggs as a free-living flatworm. In addition, the intermediate stages that live in snails reproduce asexually.
Flatworms belong to the phylum Platyhelminthes, literally meaning "flatworms" in Latin. Flatworm species are divided into three classes: Turbellaria, Trematoda and Cestoda. All flatworms, according to Cool Galapagos, are hermaphroditic, soft-bodied worms with rudimentary nervous systems, no respiratory or ...
4 New 'Flatworm' Species: No Brains, No Eyes, No Problem. By Mindy Weisberger 04 February 2016. Shares. Xenoturbella hollandorum, the smallest of the new worm species, is shown on a dime.
Flatworm, also called platyhelminth, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates.A number of flatworm species are free-living, but about 80 percent of all flatworms are parasitic—i.e., living on or in another organism and securing nourishment from it. They are bilaterally symmetrical (i.e., the right and left sides are similar) and lack ...
Platyhelminthes are mostly worm like creatures that are dorsoventrally flattened, meaning they look like a ribbon, this is why they are called names such as Tapeworm, Flatworm, Fluke and Planarian. The Platyhelminthes are a successful phylum with around 25,000 known species divided into four classes.
There are three types of flatworms: Planarians (Turbellaria) Flukes (Trematoda) Tapeworms (Cestoda) What is a Planarian? Planarians are an example of free-living flatworm. Planarians feed mostly on small organisms or organisms of dead bodies. Most live under rocks, on plant materials, or in freshwater.
A planarian is one of many flatworms of the traditional class Turbellaria. It usually describes free-living flatworms of the order Tricladida (triclads), although this common name is also used for a wide number of free-living platyhelminthes. Planaria are common to many parts of the world, living in both saltwater and freshwater ponds and rivers. Some species are terrestrial and are found ...
Flatworms are members of the phylum Platyhelminthes. There are more than 20,000 known species of flatworms. They can be found in freshwater, marine, or damp terrestrial environment. Most flatworms are free-living, however, some are parasites. Parasites live in the host body and can be harmful to the host.
Flatworms are a group of very simple animals limited in size by a lack of an internal transport system, they can grow quite long though. The group contains many unpleasant internal parasites of almost every vertebrate species including man. They often alternate between host species as part of their life cycle which helps them spread more effectively.
With more than 20,000 species currently identified, the phylum Platyhelminthes makes up one of the largest phyla after chordates, mollusks, and arthropods. On the other hand, they make up the largest phylum among acoelomates. Kingdom: Animalia - Flatworms fall under the animal kingdom that is characterized by multicellular eukaryotic organisms ...