In Depth First named as a species of Hadrosaurus by Othniel Charles Marsh in 1872, Marsh later renamed this species as a distinct genus, Claosaurus in 1890. A second species, C. affinis, is now considered to be highly dubious, not only upon the grounds that it was based upon very fragmentary toe bones, but that … Read more
In Depth Arcovenator is a genus of abelisaurid theropod dinosaur that lived in what is now France during the late cretaceous. Although only known from partial remains, similarities to relative genera such as Majungasaurus from Madagascar, as well as Indosaurus and Rajasaurus from India have been made. Comparison to these others has led to speculation … Read more
In Depth Originally thought to be another specimen of Velociraptor, a CAT scan in 1998 revealed that the fossil was of a new though closely related genus. Additional study of Tsaagan has indicated that it is most closely related to Linheraptor. Tsaagan probably lived and hunted like most other small Asian dromaeosaurids, hunting either other … Read more
In Depth In 1972 Dale Russel was undertaking a study of the ornithomimid dinosaurs which saw some of the focus fall upon Ornithomimus. After studying the fossils of this genus he discovered that while some of them were not attributable to Ornithomimus, but were of an unknown ornithomimid dinosaur. However while Russel correctly identified a … Read more
In Depth Despite being a little known genus of sauropod dinosaur, Chinshakiangosaurus is one of the most important. This is because when it was described, Chinshakiangosaurus was the only example of an early sauropod dinosaur where the sides of the head can be reconstructed. This has revealed that although Chinshakiangosaurus was a sauropod, the lower … Read more
In Depth Aratasaurus is a genus of Coelurosaurian theropod dinosaur that lived in South America during the early Cretaceous. The holotype individual of Aratasaurus is estimated to have been about four years old at the time of death, and only a juvenile or at most a sub adult. Older adults would have likely been larger, … Read more
In Depth Adynomosaurus is a genus of lambeosaurine hadrosaurid dinosaur that lived in Spain during the late Cretaceous. Further Reading - Adynomosaurus arcanus, a new lambeosaurine dinosaur from the Late Cretaceous Ibero-Armorican Island of the European Archipelago. - Cretaceous Research. 96: 19–37. - Albert Prieto-M�rquez, Victor, Fondevilla, Albert G. Sell�s, Jonathan R.Wagner & �ngel Galobart … Read more
In Depth Liaoceratops was a fairly small neoceratopsian dinosaur that is nonetheless a good example of the ancestors of the later and larger ceratopsian dinosaurs such as Triceratops and Styracosaurus that lived during the late Cretaceous. Liaoceratops had the beginnings of a neck frill, though nothing like the same scale as later descendants, and no … Read more
In Depth Chuxiongosaurus is a genus of sauropodomorph dinosaur that lived in China during the very early Jurassic. For this reason Chuxiongosaurus is often remembered as the first basal sauropodomorph dinosaur to be discovered in an early Jurassic aged deposit in China. When compared to other sauropodomorph genera, Chuxiongosaurus is noted as being similar to … Read more
In Depth Astrophocaudia was a genus of sauropod named in 2012, and considered to be part of a group of sauropods called the Somphospondyli along with Sauroposeidon. Further Reading - Revision of the sauropod dinosaurs of the Lower Cretaceous Trinity Group, southern USA, with the description of a new genus, Michael D. D’Emic - 2012.