Dinosaur-like creature
The painting
A painting of this spike-backed creature was observed by an NX-01 Enterprise away team on the wall of a 4,000-year-old building on an unnamed planet. It was in the same scene as a humanoid, suggesting that they coexisted. (ENT: "Vanishing Point")
The creature looks a bit like certain dinosaurs in the family of Stegosauridae.
M-113 creatures
The ruins on the planet M-113 contained sculptures depicting a diverse range of creatures. (TOS: "The Man Trap")
