The genus Sharktooth currently includes two species, namely Sahara Sharktooth and Igidi Sharktooth. Shark toothed dinosaurs lived in North Africa during the late Cretaceous Cenomanian period. Shark toothed dragon has a very close genetic relationship with other members of the Allosaurus class, such as Kuizhoulong, Mapulong, and Southern Megalosaurus. The body size of the Shark toothed Dragon is extremely large, similar to that of the Tyrannosaurus Rex, and may even be larger. Shark toothed dinosaurs lived in an era of rampant giant beasts, including 15 meter long spiny dragons, 9-meter long wrinkled dragons, and over 30 meter long sauropod tidal dragons. There were also 12 meter long emperor crocodiles lurking in the water. Shark toothed dinosaurs are likely to have fed on giant sauropods of their time.

Allosaurus is one of the most famous large carnivorous dinosaurs, occupying the top of the food chain in late Jurassic terrestrial ecosystems. Its model species, the fragile Allosaurus, was created by the great American paleontologist Osnil in the 20th century Marsh described the naming in 1877. They are also the most abundant and widely distributed predators discovered in the Late Jurassic period. Adult Allosaurus can grow up to 9 meters in length, with a few individuals believed to reach up to 12 meters. Although not as robust as the Tyrannosaurus rex, the body proportions of the Allosaurus are more symmetrical, with more developed forelimbs, making it appear more agile. The number of specimens is also much larger than that of Tyrannosaurus rex.

The Tyrannosaurus genus is a member of the Tyrannosauridae family, and the only valid species is the type species Tyrannosaurus rex, also known as the Rex dinosaur. It is a large carnivorous dinosaur with a length of about 15 meters, a hip height of about 5 meters, and a weight of about 8 to 13 tons. Tyrannosaurus lived in the Maastrichtian stage of the late Cretaceous period, approximately 67 to 66 million years ago, and was one of the last dinosaur populations before the Cretaceous Tertiary extinction event. Fossils are distributed in the western United States and Canada in North America, with a wider distribution range than other tyrannosaurids.