The following is a list of unidentified non-humanoid species from unknown eras.
Dinosaur-like creature []
The creature in a painting
A painting of this spike-backed creature was observed by an Enterprise NX-01 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")
Kyrian museum exhibits []
These non-humanoids were on display at the Museum of Kyrian Heritage, circa 3074. (VOY: "Living Witness")
M-113 carving lifeforms []
The ruins on the planet M-113 contained sculptures depicting a diverse range of creatures. (TOS: "The Man Trap")
Sarpeidon ice age animals []
 Zarabeth's fur coat  Meat from an animal |
These animals were the source of Zarabeth's food and clothing. Spock ate some of the animal flesh when he was stranded on Sarpeidon with Leonard McCoy. (TOS: "All Our Yesterdays")