Torvosaurus tanneri

Torvosaurus tanneri was a large megalosaurid theropod dinosaur that lived during the Late Jurassic period in western North America. It was one of the largest predators of its era, with a robust build, large skull, and blade-like teeth. It coexisted with other Morrison Formation dinosaurs including Allosaurus, Stegosaurus, and Diplodocus.

Torvosaurus tanneri fossils have been found in the Morrison Formation of western North America, with the original specimens discovered in Colorado. Additional Torvosaurus material has been identified at other Morrison Formation sites across the American West. Fossils of a closely related species, Torvosaurus gurneyi, have also been found in Portugal.

Torvosaurus tanneri was comparable to or slightly larger than Allosaurus, estimated at roughly 9 to 10 meters (about 30 feet) in length. It was more robustly built than Allosaurus, with a heavier skull and more powerful forelimbs ending in three large claws. Despite being less common in the fossil record, it was likely the apex predator in parts of the Morrison Formation ecosystem.

Yes, Torvosaurus and Allosaurus both lived in the Morrison Formation during the Late Jurassic and were likely competitors for prey. Allosaurus is far more abundant in the fossil record, suggesting it was the more common predator. Torvosaurus's larger size and more powerful build may have allowed it to occupy a different ecological niche, possibly targeting different or larger prey.