Silurian pet

The Silurian pet was a member of a species of dinosaur unlike any the Third Doctor had seen before.

It was preserved from extinction by the Silurians and revived with them in the 20th century, where it guarded the caves underneath Wenley Moor.

Major Baker was attacked and wounded by the creature after he fired upon a Silurian he had seen. (TV: Doctor Who and the Silurians)

Behind the scenes

 * In the novelisation, the creature is a Tyrannosaurus rex.
 * Although the dinosaur is never identified on-screen, it would appear to be an allosaurus.