In Depth Irisosaurus is a genus of sauropodomorph that lived in Asia during the early Jurassic. Though only known from partial remains, Irisosaurus is thought to have been similar to the genus Mussaurus. Further reading - A new species of early-diverging Sauropodiformes from the Lower Jurassic Fengjiahe Formation of Yunnan Province, China. - Scientific Reports. … Read more
In Depth Xiaosaurus is a genus of small ornithischian dinosaur that lived in China during the Jurassic. Further Reading - New ornithopod genus from the Middle Jurassic of Sichuan Basin, China . - Vertebrata PalAsiatica 21(2):168-171. - Z. Dong & Z. Tang - 1983.
In Depth Tatankacephalus is a genus of nodosaur that lived in what is now Montana during the early Cretaceous period. Best known from an incomplete skull, Tatankacephalus has been interpreted as a close relative to the better known nodosaurid dinosaur Gastonia. A different genus of nodosaurid dinosaur from the same location as Tatankacephalus is Sauropelta, … Read more
In Depth For a long time Caenagnathasia has been known from only jaw material, and even with the subsequent discovery of an upper leg bone and vertebrae, not much is known about this dinosaur. Two facts can however be established about Caenagnathasia. First, Caenagnathasia is one of if not the smallest oviraptosaur currently known. Second, … Read more
In Depth Chuanjiesaurus is a genus of sauropod dinosaur that lived in China around the mid Jurassic period. Chuanjiesaurus seems to be similar to the genus Mamenchisaurus, something which has led to Chuanjiesaurus sometimes identified as a mamenchisaurid sauropod. Further Reading - [Lower, Middle, and Upper Jurassic divisions of the Lufeng region of Yunnan province]. … Read more
In Depth Known to have lived in Germany during the Triassic, Batrachotomus is one of the largest known rauisuchians from Europe. Sometimes dubbed a European relative of the North American Postosuchus, Batrachotomus was actually quite a bit larger than even the largest estimate for Postosuchus, and at about six meters in length, only shorter than … Read more
In Depth Nasutoceratops was the second genus of centrosaurine ceratopsian dinosaur to be discovered in the south west of the USA, the first genus being Diabloceratops that was named three years earlier. Back in the Cretaceous the South-west of what is now the USA was the southern portion of Laramidia, an island landmass extending from … Read more
In Depth Named using the Zuni for ‘grinding mouth’ Jeyawati’s classification is a little uncertain. Usually Jeyawati is classed as a hadrosaurid, but body features have led some researchers to place Jeyawati within the much broader ornithopod classification. Further and more complete skeletal material may yet shed more light upon the body of Jeyawati resulting … Read more
In Depth As stegosaurs go Chungkingosaurus was towards the smaller end of the scale at four meters long. The hips and humerus (upper arm bone) of Chungkingosaurus seem to be quite primitive when compared to other stegosaurs. The skull is also deep which might be a relict primitive trait, or an adaptation for supporting stronger … Read more
In Depth Penelopognathus is a genus of hadrosauroid dinosaur that lived in Mongolia during the early Cretaceous. Unfortunately, because only a partial jaw of this dinosaur has been recovered, not much is known about Penelopognathus. Further Reading - A new primitive hadrosauroid dinosaur from the Early Cretaceous of Inner Mongolia (P. R. China). - Comptes … Read more