Bistahieversor: Research Database Tyrannosauridae (Theropoda) · Late Cretaceous (~75–73 MYA) · North America — USA, New Mexico (Hall Lake, Naashoibito Members) Research Note: Bistahieversor was a tyrannosaurid theropod from the Late Cretaceous of New Mexico, representing one of the oldest known tyrannosaurids from the southwestern United States. Notable for its relatively slender build compared … Read more
Dilong: Research Database Tyrannosauroidea (Theropoda) · Early Cretaceous (~130-120 MYA) · Asia — China (Liaoning, Yixian Formation) Research Note: Dilong was a tyrannosauroid theropod from the Early Cretaceous of Liaoning, China — one of the earliest known tyrannosauroids with preserved filamentous integument and an important taxon for understanding the early evolution of tyrannosaurs and … Read more
In Depth First discovered in 1984 and originally described as a species of Stokesosaurus in 2008, S. langhami was re-described as a new genus of tyrannosaur in 2013. As is standard practice with such occurences, the original species name of langhami was retained to create the new type species, Juratyrant langhami. The species name is … Read more
Labocania: Research Database Tyrannosauroidea (Theropoda) · Late Cretaceous (~73 MYA) · North America — Mexico (Baja California) Research Note: Labocania was a tyrannosauroid from the Late Cretaceous of Baja California, Mexico — an important taxon for understanding tyrannosauroid evolution and biogeography in western North America. Research Finding Status Grade Year Method Citation Impact … Read more
Dryptosaurus: Research Database Tyrannosauroidea (Theropoda) · Late Cretaceous (~67-65 MYA) · North America — USA (New Jersey, Chesapeake Bay) Research Note: Dryptosaurus was a tyrannosauroid theropod from the Late Cretaceous of New Jersey — one of the earliest known tyrannosauroids and an important taxon for understanding tyrannosauroid evolution. Research Finding Status Grade Year … Read more
Jinbeisaurus: Research Database Theropoda (Dinosauria) · Early Cretaceous (~130 MYA) · Asia — China (Liaoning) Research Note: Jinbeisaurus was a theropod from the Early Cretaceous of Liaoning, China — an important taxon for understanding theropod diversity and evolution in the Cretaceous of East Asia. Research Finding Status Grade Year Method Citation Impact Xing … Read more
In Depth Dating back around one-hundred and fifty-two million years ago, Stokesosaurus is one of the earliest representatives of the tyrannosaur lineage, being only slightly later than Guanlong. At up to four meters long, Stokesosaurus resembled the juvenile forms of later tyrannosarids, and was a fleet footed predator relying upon speed to catch prey. Stokesosaurus … Read more
Suskityrannus: Research Database Tyrannosauroidea (Theropoda) · Late Cretaceous (~92 MYA) · North America — USA, New Mexico (Moreno Hill Formation) Research Note: Suskityrannus was a tyrannosauroid theropod from the Late Cretaceous of New Mexico — one of the earliest known tyrannosauroids from North America and an important taxon for understanding the early evolution of … Read more
In Depth Gorgosaurus had the same basic body plan of all tyrannosaurids with a large head on an s-shaped neck, small arms and bipedal stance. With around sixty teeth in its mouth (there is some variance between specimens) Gorgosaurus shared a common trait with other tyrannosaurids of its size, as the larger the tyrannosaurids go … Read more
Raptorex: Research Database Tyrannosauroidea (Theropoda) · Early Cretaceous (~126 MYA) · Asia — China (Liaoning, Yixian Formation) Research Note: Raptorex was an early tyrannosauroid from the Early Cretaceous Yixian Formation of Liaoning, China. As a juvenile tyrannosauroid specimen, it provides important data on the early evolution of tyrannosauroids before the rise of large tyrannosaurids. … Read more