In Depth Chromogisaurus is a genus of sauropodomorph dinosaur that lived in South America during the late Triassic. At only about two meters long, Chromogisaurus was small for its kind, though certainly not unique. The main predators of Chromogisaurus would have mainly been the emerging theropod dinosaurs, though late surviving rauisuchians would have been potential … Read more
In Depth Traukutitan is a genus of titanosaurian dinosaur that lived in South America during the late Cretaceous. Traukutitan was named after Trauku, an Araucanian mountain spirit. The species name T. eocaudata is a reference to the primitive appearing form of the caudal vertebrae. There is speculation that Traukutitan was a lognkosaurian titanosaur, and this … Read more
In Depth Khaan is a genus of small oviraptorid dinosaur that lived in Mongolia during the Late Cretaceous. Studies into Khaan individuals may have revealed differences between males and females. On some specimens, the caudal (tail) vertebrae have reduced chevrons, and this has been seen as a sign of a female. The reduced chevrons at … Read more
In Depth In 1983 a fossil hunter named William Walker discovered a large fossilised claw in a clay pit. Retrieval of this claw also resulted in the recovery of associated bones that revealed a new and previously unknown type of theropod dinosaur. Alan Charig and Angela Milner described and formerly named the new dinosaur Baryonyx … Read more
In Depth Ambopteryx is a genus of scansoriopterygid dinosaur that lived in Asia during the late Jurassic. The name Ambopteryx means ‘both wing’ and this is a reference to the observations that fossil impressions with the holotype skeleton show that Ambopteryx was feathered, but then had bat-like membranous wings which were not feathered as well. … Read more
In Depth Chubutisaurus seems to have been a large but primitive titanosaur that lived in Chubut Province towards the end of the early Cretaceous, hence the name which means ‘Chubut lizard’. Although known from different members of the Cerro barcino Formation, possible predatory threats to Chubutisaurus might have included large theropod dinosaurs such as Genyodectes … Read more
In Depth Sinornithoides is a genus of small troodontid dinosaur that lived in China during the early Cretaceous. The holotype individual of this genus, a subadult, was found in a nesting position with its head tucked under its left arm, very similar to how another small troodontid named Mei was found. This may indicate that … Read more
In Depth Not many fossilised bones of this dinosaur are known, but those that are are simply huge. Comparing these bones to the more complete remains of other genera has resulted in very rough estimates of around thirty meters long, raising the probability that Ruyangosaurus was one of the largest animals to ever walk the … Read more
In Depth Janenschia is a genus of titanosaur that has a classification history closely tied to the African diplodocid sauropod Torneria and by extension the North American Barosaurus and the English Gigantosaurus. We start in England in 1869 when Harry Govier Seeley named Gigantosaurus based upon a few vertebrae, partial limb bones and an osteoderm. … Read more
In Depth Leptorhynchos is based upon the description of caenagnathid oviraptorid dinosaur remains discovered in the Aguaja Formation of Texas, establishing the type species L. gaddisi. At the same time as this description, fossils from the Dinosaur Park Formation of Alberta and originally attributed as a species of Ornithomimus, O. elegans, have also been re-described … Read more