Question

Lamprey (Petromyzon) belongs to

• A. Chondrichthyes
• B. Osteichythes
• C. Agnatha
• D. Amphibia

Answer 1

The correct option is C Agnatha

A. Class Chondrichthyes comes under the superclass Pisces. Most fishes are marine and a few live in the tropical rivers.

B. Class Osteichthyes comes under the superclass Pisces and includes lungfishes, lobbed finned fishes and ray-finned fishes.

C. Agnatha is a paraphyletic superclass of jawless fish and includes two class, Cyclostomata, and an extinct class Ostracodermi.

D. Class Amphibia comprises the animals that inhabit both land and water.

Lamprey (Petromyzon) belongs to class Cyclostomata under superclass Agnatha.

So, the correct answer is 'Agnatha'.