Amphibian Classification

Amphibians: division into three orders

Amphibian Orders

APODA (Gymnophiona)

- The body of the apodas is cylindrical, elongated and smooth.

- They have stunted legs.

- Fertilization is internal.

- The body of apodas looks like a big worm.

- They have olfactory tentacles.

- Absorb oxygen through the mouth and skin. The breath is pulmonary.

Examples of apodas: blind snakes.


- Urodels, also known as caudados, have four short legs.

- Body with elongated tail.

- Possess the ability to regenerate the tail or body limbs when severed.

- During winter, many species of urodels go into hibernation.

- They live in humid regions or near rivers and lakes. They need moisture because their skin is very sensitive to dry weather.

Examples of urodels: newts, proteus and salamanders.


- The body of the anurans has no tail.

- Anurans have four legs (tetrapods). The hindquarters are elongated.

- They have bulging eyes.

- The vast majority of anuran species have complete metamorphosis.

Examples of frogs: frogs, frogs, tree frogs.