$Ambystoma$ shows:

$A$: $Ichthyophis$ is a poikilothermic animal.
$R$: Amphibians maintain their body temperature with the changing temperature of the environment.

Statement $X$: The skin of amphibians acts as a respiratory organ.
Statement $Y$: Amphibians lack an exoskeleton and have moist skin.

Which type of kidneys are found in amphibians?

The limbless amphibian is

The Indian salamander is: