Question

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

Answer 1

Hint:- Lamprey or sea lamprey is a parasitic lamprey native to the northern hemisphere.It is sometimes referred to as a vampire fish. Belongs to the class cylostomata. Lamprey is considered as of the earliest vertebrates.

Complete step-by-step solution:-
Lamprey and hagfish or Petromyzon and Myxine are both agnathans as they are jawless fishes. They are sometimes considered as the earliest vertebrates. They also lack paired fins or stomach. They have a pineal eye. The adults and larvae usually have a notochord.
The class of Lamprey ( Petromyzon) is cyclostomata.
1. Chameleon( Anolis) - Chameleon belongs to the class Reptiles.
2. Salamander (Ambystoma) - Salamander belongs to the class Amphibia
3. Hagfish (Mystine) - Hagfish belongs to the class cyclostomata.
4. Lungfish (Neoceratodus) - Lungfish belongs to the class Pisces.
So from above we can see both lamprey and hagfish belong to the same class that is 'cyclostomata'.
From the above discussion we can conclude that the correct answer is option B Hagfish.

Additional information: Lamprey belongs to Kingdom Animalia. Its phylum is Chordata
- There are about 38 known extant species of lampreys and five known extinct species.Parasitic carnivorous species are the most well-known, and feed by boring into the flesh of other fish to suck their blood but only 18 species of lampreys engage in this micro predatory lifestyle.
- Out of 18 carnivorous species, nine migrate from saltwater to freshwater to breed (some of them also have freshwater populations), and nine live exclusively in freshwater. All non - carnivorous forms are freshwater species.Adults of the non-carnivorous species do not feed; they live off reserves acquired as ammocoetes (larvae), which they obtain through filter feeding.

Note:- The sea lamprey (Petromyzon marinus) is a parasitic lamprey native to the Northern Hemisphere. It is sometimes referred to as the "vampire fish." Here, Correct answer is Hagfish as both belong to class cyclostomata.