Tyrannotitan: Research Database Abelisauridae (Theropoda) · Early Cretaceous (~118-110 MYA) · South America — Argentina (Chubut, Cerro Barcino Formation) Research Note: Tyrannotitan was a large abelisaurid theropod from the Early Cretaceous of Argentina — one of the largest known abelisaurids and an important taxon for understanding theropod diversity and evolution in South America during … Read more
Achillesaurus: Research Database Mesozoic · Fossil Record Research Note: Achillesaurus was a significant fossil species providing important data on vertebrate evolution during the Mesozoic era. Research Finding Status Grade Year Method Citation Impact Martinelli & Vera 2009: Achillesaurus and theropod diversity in the Cretaceous Zootaxa Confirmed A 2009 Fossil Martinelli & Vera, Zootaxa … Read more
Shuangmiaosaurus: Research Database Ornithischia (Dinosauria) · Late Cretaceous (~100-94 MYA) · Asia — China (Liaoning, Majiacun Formation) Research Note: Shuangmiaosaurus was an ornithischian dinosaur from the Late Cretaceous of Liaoning, China — an important taxon for understanding ornithischian diversity and evolution in the Cretaceous of Asia. Research Finding Status Grade Year Method Citation … Read more
In Depth Although very little is known about this dinosaur, the dentary which has been used to establish the genus is noted as having a flat ramus. Ratchasimasaurus is thought to been an igaunodont, which in the loosest terms means that it was related to dinosaurs like Igaunodon. Further Reading - A New Iguanodontian Dinosaur … Read more
Albertadromeus: Research Database Ornithischia (Dinosauria) · Late Cretaceous (~77 MYA) · North America — Canada (Alberta, Dinosaur Park Formation) Research Note: Albertadromeus was a small ornithischian from the Late Cretaceous of Alberta, Canada — an important taxon for understanding ornithischian diversity in the Dinosaur Park Formation. Research Finding Status Grade Year Method Citation … Read more
In Depth Eustreptospondylus was first described in 1841, but the original fossil material has since been lost. A second set of remains was discovered in 1964 and is surmised to be Eustreptospondylus based upon the description of the original material. The new material features vertebra that are lacking development of the upper parts, indicating that … Read more
Gannansaurus: Research Database Sauropoda · Late Cretaceous · Asia — China Research Note: Gannansaurus was a sauropod dinosaur from the Late Cretaceous of China. It contributes to our understanding of sauropod diversity and biogeography in Late Cretaceous Asia. Research Finding Status Grade Year Method Citation Impact Mannion & Barrett 2013: Gannansaurus and Chinese … Read more
Skorpiovenator: Research Database Abelisauridae (Theropoda) · Late Cretaceous (~83–80 MYA) · South America — Argentina (Huincul Formation) Research Note: Skorpiovenator was a large abelisaurid theropod from the Late Cretaceous of Argentina — one of the most completely known abelisaurids and the apex predator of the Huincul Formation ecosystem. Its name means “scorpion hunter” — … Read more
Tarchia: Research Database Ankylosauridae (Ornithischia) · Late Cretaceous (~70 MYA) ·> Asia — Mongolia (Nemegt Formation) Research Note: Tarchia was an ankylosaurid from the Late Cretaceous Nemegt Formation of Mongolia. As one of the latest known ankylosaurids, it provides important data on armored dinosaur diversity in the Latest Cretaceous of Asia. Research Finding … Read more
Aerosteon: Research Database Carcharosauridae (Theropoda) · Late Cretaceous (~85–80 MYA) · South America — Argentina (Portezuelo Formation, Patagonia) Research Note: Aerosteon was a large carcharosaurid theropod from the Late Cretaceous of Argentina — one of the later large theropods from Patagonia. As a member of the Carcharosauridae, it provides data on theropod diversity and … Read more