What are some characteristics of the class Turbellaria?
Class Turbellaria(flatworms)
- True bilateral symmetry.
- Dorso-ventral flattening of the body.
- Unsegmented.
- Ciliated epidermis.
- System of sheathed nerve fibers.
- Parenchyma between the epidermis and the gastrodermis.
- Some cephalization.
- Blind ending gut.
What is an example of Turbellaria?
Polycladida
TricladidaGeoplanidae
Turbellaria/Lower classifications
What do turbellarians eat?
Unlike their parasitic cousins in the flatworm group (the tapeworms and flukes), most turbellarians are free-living, and most are carnivores, eating tiny aquatic invertebrates such as rotifers, small crustaceans, and other worms.
Why turbellarians are named so?
The name “Turbellaria” refers to the “whirlpools” of microscopic particles created close to the skins of aquatic species by the movement of their cilia.
What is classification of Turbellaria?
Turbellaria
Turbellaria/Scientific names
What are some characteristics of free living turbellarians?
Turbellarians also are free-living or commensal (not usually parasitic), usually aquatic, and have a stomodeal pharynx. Their cellular epidermis is usually ciliated and contains mucous secreting cells and structures called rhabdoids that can produce copious mucus to prevent desiccation.
What are the simple eyespots in Turbellarians called?
48 Cards in this Set
| When the adult of a descendant species resembles the larval form of the ancestral species, this is… | Paedomorphosis |
|---|---|
| Chemoreceptors that aid in the location of food are especially dense in the __________ of turbellarians. | Auricles |
| The simple eyespots seen in most turbellarians are called… | Ocelli |
What are some characteristics of free-living Turbellarians?
Do turbellarians have digestive system?
The digestive system of turbellarians typically consists of mouth, pharynx, and intestine. In the order Acoela, however, only a mouth is present; food passes directly from the mouth into the parenchyma, to be absorbed by the mesenchymal cells. The excretory system consists of protonephridia.
Where do free-living flatworms live?
Most freshwater flatworms are free-living and can be found in ponds, lakes, streams, ditches, and temporary puddles. They live under rocks, plants, and debris to avoid direct sunlight. They can be found on hard and soft substrates, but are more common on the hard surfaces.
Why are turbellarians free-living?
They are free-living organisms with some of them having regenerative properties. They are hermaphrodites. This means they do not differ in terms of sexes. For copulation, two turbellarians meet and form multiple eggs.
How are turbellarians different from other flatworms?
All flatworms must expel undigested food out of their mouth; they do not have an anus. Turbellarians move around using cilia on their epidermis or by undulating their body with their muscles. Most turbellarians live in water, either fresh or salt water.
What kind of habitat does a Turbellaria live in?
With over 3000 members (species), Turbellaria is a class of the Phylum Platyhelminthes. As such, they are multicellular flatworms characterized by flattened appearance. They can be found in many aquatic habitats as well as given terrestrial environments.
Which is a suborder of Rhabdocoela Turbellaria?
Brusca and Brusca (2003) include Temnocephalida as a suborder of Rhabdocoela, and recognize an additional class, Proplicastomata, which includes known specimens from Greenland. Like other members of the phylum Platyhelminthes (flatworms), those of the class Turbellaria are dorsoventrally compressed, with high surface area to volume ratios.
Is the class Turbellaria made up of free living organisms?
Some organisms in the group have been shown to have a regenerative capability which has attracted significant attention from the scientific community. * The class Turbellaria is the only group under the Phylum Platyhelminthes that consists of free-living organisms – All the other classes are made up of parasitic species.
What kind of habitat does a Tricladida live in?
* Tricladida is exclusively terrestrial while larger species like Polycladida can be found under rocks and stones (they are described as being epibenthic). The majority (about two-thirds) of Turbellarians are small in size, measuring between 0.8 and 2mm in length.