Question

Small, solid and four lobes or colliculus called as corpora quadrigemina are found in
A. Mammals
B. Amphibians
C. Aves
D. Reptiles

Answer 1

Hint: Group of the vertebrate animals and also called warm blooded vertebrates (which have backbone) with hair. They are the most adaptable animals on the Earth.

Complete answer:
The superior colliculus forms a major component of the midbrain. It is a paired structure and together with the paired inferior colliculi forms the corpora quadrigemina and this is found in mammals, so this is the answer. The superior colliculus is the layered structure that has a number of layers that can vary from species to species. The layers can be grouped together into the superficial layers also called stratum opticum. In mammals, the massive expansion of the cerebral cortex reduces the super colliculus to a much smaller fraction of the whole brain.
The superior colliculus is a synaptic layered structure and the 2 superior colliculi sit below the thalamus and surrounds the pineal gland in the mammalian midbrain. The superior colliculus consists of the posterior to the periaqueductal gray, dorsal aspect of the midbrain and immediately superior to the inferior colliculus. The inferior and superior colliculi collectively known as corpora quadrigemina. The quadrigemina means quadruplet bodies. So, the small, solid and four lobes or colliculus called corpora quadrigemina are found in mammals.

Thus, the correct answer is option A. i.e., Mammals.

Note: The superior colliculus is associated with a nearby structure called the parabigeminal nucleus, referred to as satellite. In the optic tectum this nearby structure is known as nucleus isthmi.