Koparion Facts
| Diet | Carnivore |
| Height | 0.3m |
| Length | 1m |
| Weight | 500 g |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Theropod |
| Location | North America |

| Diet | Carnivore |
| Height | 0.3m |
| Length | 1m |
| Weight | 500 g |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Theropod |
| Location | North America |
Koparion was a small theropod dinosaur that lived during the Late Jurassic Period, approximately 149 million years ago in what is now Utah, USA. This diminutive predator represents one of the most enigmatic dinosaurs known to science, as our entire understanding of it comes from a single isolated tooth discovered in the famous Morrison Formation.
Despite the limited fossil evidence, the tooth provides valuable clues about Koparion's identity and lifestyle. The tooth's distinctive features suggest it belonged to a small, agile theropod that was likely closely related to the troodontids, a group known for their intelligence and bird-like characteristics. Based on comparisons with similar dinosaurs, Koparion would have been roughly the size of a modern chicken, standing about 30 centimetres tall at the hip and measuring approximately one metre in length.
As a carnivore, Koparion would have been an active predator, likely hunting small prey such as early mammals, lizards, and insects in the lush, subtropical environments of the Late Jurassic. Its small size and presumed agility would have allowed it to exploit ecological niches unavailable to larger predators like Allosaurus, which also roamed the Morrison Formation landscapes.
The discovery of Koparion highlights the incredible diversity of small theropods during the Late Jurassic Period, though much about this mysterious dinosaur remains unknown due to the fragmentary nature of its remains.
Koparion is known only from a single distinctive tooth with serrated edges characteristic of small predatory dinosaurs. The tooth's shape and size suggest it belonged to a troodontid-like theropod with sharp, cutting teeth designed for processing small prey.
Based on its presumed relationship to troodontids, Koparion likely exhibited intelligent hunting behaviour and may have been capable of quick, agile movements to catch small, fast-moving prey. It probably hunted alone or in small groups, using its keen senses to locate insects, small mammals, and other prey in the undergrowth.
Koparion was first described by Kenneth Carpenter in 1994. The original fossils were discovered at Morrison Formation, Utah, USA.