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CBSE Class 11-science Answered

Enlist the characteristic features of Petromyzon as representative of class Cyclostomata.
Asked by Topperlearning User | 10 Jul, 2014, 01:31: PM
answered-by-expert Expert Answer

Characteristic features of Petromyzon:

  1. It is an ectoparasite.

  2. The body is elongated bearing 6-15 pairs of gills.

  3. The mouth is circular, sucking type with jaws.

  4. Cranium and vertebral column are cartilaginous.

  5. It has a closed circulatory system.

  6. Although it is marine, it migrates to freshwater for spawning.

Answered by | 10 Jul, 2014, 03:31: PM

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