Dukar dinosaur

The Dukar dinosaur was a type of dinosaur, a gigantic reptilian lifeform native to the planet Dukar in the 23rd century.

Background
It was bipedal, between 12 to 15 feet tall, with a dark-brown scaly hide and ridges along its back. It had long forearms, large orange eyes and a wide maw. It had a narrow tail which appeared to be at least 10 feet long.

History
In the 2260s, while surveying Dukar for the USS Enterprise (NCC-1701) early in its five-year mission of exploration, Lieutenant Commander Spock discovered a Dukar dinosaur. Due to interference in the planet's atmosphere, Spock was unable to contact the Enterprise and was forced to fight the creature, and he killed it with his phaser. During this incident, Queen of the planet Neesan received an empathic impression of Spock's encounter with the dinosaur and believed it to be the image of Unruho, a Neesan deity. She ordered a huge stone carving sculpted of her vision, complete with two Dukar dinosaur heads at its base.

In 2266, the Enterprise visited Neesan and discovered the monument of Unruho. Recognizing the images at its base led Spock to recall the incident and realize how the monument came to be made.