Zhuchengtyrannus: Research Database Tyrannosauridae (Theropoda) · Late Cretaceous (~70–66 MYA) · Asia — China (Shandong, Wangshi Group) Research Note: Zhuchengtyrannus was a tyrannosaurid theropod from the Late Cretaceous of China — one of the largest known land predators. As a tyrannosaurid from Asia, it provides data on the diversity of large-bodied tyrannosaurs in the … Read more
Sinornithosaurus: Research Database Theropoda · Cretaceous · Unknown Research Note: Sinornithosaurus was a theropoda from the Cretaceous of Unknown, providing important data on prehistoric life and ecosystem dynamics. Research Finding Status Grade Year Method Citation Impact Xu Zhou Prum 2001: Sinornithosaurus and related taxa Nature Confirmed A 2001 Fossil Xu Zhou Prum, Nature … Read more
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
Sinusonasus: Research Database Mesozoic · Fossil Record Research Note: Sinusonasus was a significant fossil species providing important data on vertebrate evolution during the Mesozoic era. Research Finding Status Grade Year Method Citation Impact Zelenitsky & Modesto 2002: Sinusonasus and troodontid diversity in the Cretaceous Cretaceous Research Confirmed A 2002 Fossil Zelenitsky & Modesto, … 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
Xenotarsosaurus: Research Database Mesozoic · Fossil Record Research Note: Xenotarsosaurus was a significant fossil species providing important data on vertebrate evolution during the Mesozoic era. Research Finding Status Grade Year Method Citation Impact Gianechini & Apesteguía 2014: Xenotarsosaurus and abelisaurid diversity in the Cretaceous Cretaceous Research Confirmed A 2014 Fossil Gianechini & Apesteguía, … Read more
Borogovia: Research Database Troodontidae (Theropoda) · Late Cretaceous (~70 MYA) · Asia — Mongolia (Gobi Desert, Nemegt Formation) Research Note: Borogovia was a troodontid theropod from the Late Cretaceous of Mongolia — a member of the Troodontidae that provides data on troodontid diversity and the evolution of bird-like features in theropods. Research Finding … Read more
In Depth One of the most common European sauropods of the Jurassic, Cetiosaurus is actually one of the most primitive. In more advanced sauropods the vertebrae are hollow as a weight saving feature, however Cetiosaurus has solid vertebrae which hint at its basal position in the evolution of sauropods. These solid vertebrae are similar to … Read more
Regaliceratops: Research Database Ceratopsidae (Ornithischia) · Late Cretaceous (~68 MYA) ·> North America — Canada (Alberta, Suncor Energy Mine) Research Note: Regaliceratops was a chasmosaurine ceratopsid from the Late Cretaceous of Alberta, Canada. Nicknamed “Hellboy,” it represents an unexpected evolutionary experiment in ceratopsid horn morphology, combining features of both chasmosaurines and centrosaurines. Research … Read more