What class does Turbellaria belong to?

What class does Turbellaria belong to?


Turbellaria Temporal range: Possible Ordovician record
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Turbellaria Ehrenberg, 1831

What is a commensal Tubellarian?

Generally, commensalism implies the sharing of the same food by the turbellarian and its partner. This concept of commensalism provides a useful background against which most turbellarian associations can be considered.

How do Turbellaria live?

Turbellarians lack a respiratory and circulatory system, so they are extremely thin and require aquatic (or very moist) habitats. They can be found in ponds, lakes, streams, springs, and even cave streams, usually in submerged leaf litter or under rocks.

How long does a planarian live?

The planarians live as long as they are not killed. If they are well cared for, they will live indefinitely.

Why are Turbellarians free-living?

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 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.

How do Turbellaria see?

Turbellarians sense their environment with statocysts, chemoreceptors, and photoreceptors. They do not have image-forming eyes, but many species have pigment cells and photoreceptors concentrated into eyespots.

How does a Turbellaria eat?

Turbellarians eat both living and dead animal material. Some turbellarians secrete digestive enzymes onto their food, then ingest the already-digested food particles through their pharynx. Others digest food in their digestive cavity. Most turbellarians live in water, either fresh or salt water.

What is the life cycle of a planarian?

Eggs develop inside the body and are shed in capsules. Weeks later, the eggs hatch and grow into adults. In asexual reproduction, the planarian detaches its tail end and each half regrows the lost parts by regeneration, allowing endoblasts (adult stem cells) to divide and differentiate, thus resulting in two worms.

What does a planarian eat?

Planarians swim with an undulating motion or creep like slugs. Most are carnivorous night feeders. They eat protozoans, tiny snails, and worms.

Is an example of free-living flatworm?

Planaria is a free-living freshwater flatworm. Planaria belongs to the class Turbellaria, which mostly contains free-living species.

What are the examples of Turbellaria?

Turbellaria/Lower classifications