Sabre-Toothed Gorilla

Sabre-Tooth Gorilla's were one of the creatures the Doctor warned Martha Jones about that could be outside the TARDIS doorswhen they arrived on Myarr. (DW: The Infinite Quest). The head of a similar sort of creature could be seen in a case in Van Statten's museum. (DW: Dalek)

It is unknown if they are real or if the Doctor made them up.