Reptile

A reptile was a type of cold-blooded animal.

On Earth
During the 2150s Dalek invasion of Earth, many animals escaped from zoos during the plague. Most of them died, but reptiles such as alligators thrived in the London sewers. (TV: The Dalek Invasion of Earth)

Dodo Chaplet pointed out a chameleon to Steven Taylor while they were aboard the Ark. (TV: The Ark)

Elsewhere
The Cynrog were reptilian humanoids who hid behind masks and worshipped the chaos god Balor. (PROSE: The Nightmare of Black Island)

The Re'nar were intelligent lizard-like reptiles from the Matrua Nebula that were at war with the Ju'wes. (COMIC: Ripper's Curse)

Historians who studied the Dalek race believed that, like on Earth, the dominant lifeform on prehistoric Skaro had been large reptilian creatures. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)