2
Question
The Lamprey (Petromyzon) is included in the same taxonomic class as the:
The Lamprey (Petromyzon) is included in the same taxonomic class as the:
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Solution
The correct option is B Hagfish (Myxine)
Cyclostamata is a group of agnathas that comprise of living jawless fishes. Due to their circular mouth, they are named Cyclostomata. Cyclostomata includes Petromyzon (Lamprey) and Myxine (Hagfish).
Cyclostomes have following features:
- They have an elongated body bearing 6-15 pairs of gill slits for respiration.
- Cyclostomes have a sucking and circular mouth without jaws and body is devoid of scales and paired fins.
- Cranium and vertebral column are cartilaginous and show closed type of circulation.
- Cyclostomes are marine but migrate for spawning to fresh water, after spawning, within a few days, they die, and their larvae, after metamorphosis, return to the ocean.
Cyclostamata is a group of agnathas that comprise of living jawless fishes. Due to their circular mouth, they are named Cyclostomata. Cyclostomata includes Petromyzon (Lamprey) and Myxine (Hagfish).
Cyclostomes have following features:
- They have an elongated body bearing 6-15 pairs of gill slits for respiration.
- Cyclostomes have a sucking and circular mouth without jaws and body is devoid of scales and paired fins.
- Cranium and vertebral column are cartilaginous and show closed type of circulation.
- Cyclostomes are marine but migrate for spawning to fresh water, after spawning, within a few days, they die, and their larvae, after metamorphosis, return to the ocean.
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