Question

The lamprey (Petromyzon) is included in the same taxonomic class as the
A. Chamaeleon (Anolis)
B. Hagfish (Myxine)
C. Salamander (Ambystoma)
D. Lungfish (Neoceratodus)

Answer 1

Hint: Lamprey is the lawless fish. They have a toothed and a funnel-shaped sucking mouth. They belong to the phylum Chordata and come under class Cyclostomata.
Let's discuss the above options and find the correct answer:

Complete step-by-step answer:
- Chamaeleon (Anolis): Chameleons are the different and specialised clades of the old world lizards. This species has various ranges of colour and can change colour. They are the species of the animal kingdom and come under the phylum Chordata. It is included in the class reptilia.
- Hagfish (Myxine): Hagfish is the marine fish which has an eel- shaped structure and slime- producing. They are the only living animals that consist of a skull. They belong to the phylum Chordata and class Cyclostomata.
- Salamander (Ambystoma): They are a group of amphibians which looks like a lizard. They consist of slender bodies, blunt snouts, short limbs etc. They belong to the phylum Chordata and come under the class amphibians.
- Lungfish (Neoceratodus): Lungfish is the freshwater fish that belong to the order Dipnoi. They can breathe air and have a lobed- fin with the presence of an internal skeleton. They belong to the phylum Chordata and class Sarcopterygii.
Hence, the lamprey is included in the same taxonomic classes as the hagfish.
So, the correct answer is hagfish.

Note: Lamprey and the catfish are together known as agnathans. They both are the jawless fish and have a simple, cartilaginous skeleton.