Apoda are a group of limbless, burrowing amphibians commonly known as caecilians. They are characterized by their elongated bodies and lack of limbs, resembling worms or snakes.
Amphibia: A class of cold-blooded vertebrates that includes frogs, toads, salamanders, and caecilians.
Gymnophiona: The order within Amphibia that encompasses all caecilians.
Internal Fertilization: A reproductive process where fertilization occurs inside the female's body.