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Cyclostomes

Cyclostomes


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Lamprey: examples of cyclostomate

What they are - biological definition

Also known as agate, cyclostomates are vertebrate aquatic animals.

Main characteristics of cyclostomas

- They have no jaws.

- The vertebral system of these animals is made up of cartilage and not bones as in most vertebrate animals.

- They have elongated and cylindrical body.

- They do not have scales, so they have smooth skin.

- Suction mouth in a circular shape with the presence of horny teeth.

- Breathing performed through gills.

- They have a simple brain (incomplete).

- They do not have even fins.

- Cyclostomes have an incomplete spine.

- They present rudimentary skull (undeveloped).

- External fertilization. In witches, development is direct, while in lampreys it is indirect.

- Most cyclostomaids are anadromous animals, that is, they breed in freshwater, but develop and spend most of their life in saltwater.

- They are aquatic ectoparasites.

- The notochord of these animals remains for a lifetime.

Examples (Representatives)

- Lamprey: There are species that live in the sea and another in freshwater rivers and lakes. They use their mouth cups to attach themselves to the skin of their prey. With the help of their teeth and tongues, they suck the blood and internal tissues of their prey.

- Witches: animals that live in the mud of the seabed. They feed on small fish and crustaceans. They are also known as witches.

Witchfish, also known as a witch, is a cyclostomated marine animal.