Question

What is an example of Chondrichthyes?

Answer 1

Vertebrata:

1. The members of this sub-phylum possess a persistent notochord during embryonic development, and after the development into an adult, the notochord gets replaced by a bony vertebral column.
2. They have a muscular heart, kidneys, and paired appendages.

Chondrichthyes:

1. The superclass of phylum Vertebrata that bear fins.
2. These are the marine vertebrates that have streamlined bodies and have a cartilaginous endoskeleton.
3. The notochord is persistent throughout life.

Example :

Scoliodon:

1. The member of superclass Chondrichthyes is commonly called dogfishes.
2. It is distributed in pacific west India, the eastern coast of South America, and the Atlantic oceans.
3. The body of Scoliodon is spindle-shaped and elongated.
4. The entire body is covered with placoid scales(exoskeleton).