👉 Cryptonchoidea is a group of organisms that belongs to the phylum Chordata, which includes animals such as birds, bats, and fish. They are characterized by their long, slender bodies with flattened tails, large eyes, and specialized brains. The most well-known members of this group are the chameleons, which have the ability to change color and shape due to chemical changes in the skin or other structures of their body.