It is a small theropod dinosaur known for its unique jaw and slender hind limbs. The mandible does not have an external mandibular window, and the neural spines of the posterior dorsal vertebrae are fan-shaped and have hook shaped protrusions for attaching ligaments. The first metacarpal bone is short and thick, the cervical spine is retroverted, and the femur lacks the fourth trochanter. Phylogenetic analysis shows that Megalosaurus belongs to the Coelurosauria class, which is a type of theropod dinosaur. In addition, stomach fossils of Megalosaurus suggest that it may have fed on small lizards. The estimated running speed is about 17.8 meters per second. Although the relationship between Megalosaurus and birds is relatively distant, its research provides important insights into the theory that birds originated from theropod dinosaurs

It is a small carnivorous dinosaur that lived in the late Cretaceous period approximately 75 million years ago. Belonging to the Chirosauridae family, it is a very agile and intelligent dinosaur. The body is about 2 meters long and weighs about 15 kilograms. It has sharp claws and strong hind limbs, making it very suitable for fast running and hunting. Having a large head and large forward looking eyes, they have excellent stereoscopic vision, which helps them accurately determine distance and speed when hunting. The forelimbs are short and have sharp claws, which can be used to catch prey or engage in close combat. The long and stiff tail helps maintain balance while running at high speeds.

It is a small ceratopsian dinosaur that lived in western North America during the Late Cretaceous period approximately 76 million years ago. The name comes from Greek and means' slender angular face ', which may refer to its relatively small head shield and horns. The body length is about 2 meters, and the estimated weight is between 68 and 200 kilograms. As a herbivorous animal, Ceratopsia may have fed on flowering plants, ferns, cycads, and pine and cypress plants at that time. Having a sharp beak shaped mouth, suitable for cutting plant leaves or needles. Fossils have mainly been discovered in Alberta, Canada and Wyoming, United States.

It is a small carnivorous dinosaur that lived during the Late Jurassic period and is considered one of the smallest known dinosaurs at that time. The name comes from Greek and means' beautiful jaw ', reflecting its delicate and narrow skull and conical nose. The body size is approximately between 60-90 centimeters, with an estimated weight of around 0.83 to 3.5 kilograms. It has slender hind limbs and a long tail, which helps maintain balance when moving. The forelimbs are relatively small, and the palm has three fingers, each with sharp claws, making it suitable for capturing prey. It feeds on small vertebrates and has the ability to prey on fast-moving small animals.

Pristosaurus is a medium-sized, lightweight terrestrial bipedal animal. The anterior teeth of the upper jaw and the particularly long common rod facing towards the rear demonstrate its originality. Molar teeth have a cutting effect, arranged in a single row, and updated in groups of three. The foot has four toes, with each toe end in the shape of a pointed hoof. Distributed in Asia, Australia, Europe, and North America, it lived from the mid Jurassic to the late Cretaceous period.