In Depth Unquillosaurus is a genus of dromaeosaurid dinosaur that lived in South America during the Late Cretaceous. At the time of the genus description (and writing here), Unquillosaurus is only known from a single pubis bone (part of the pelvis), and so it is very difficult to infer much detail about this dinosaur. Further … Read more
In Depth The remains of Beishanlong are quite incomplete, but they do tell us that this was an ornithomimosaur and a particularly large one at that. The team of palaeontologists that described the first specimens came up with an estimated length of up to eight meters long, but further study yielded the discovery that the … Read more
In Depth Tototlmimus is a genus of ornithomimosaur that lived in Mexico during the late Cretaceous. So far Tototlmimus is only known from fossils of some foot bones and fingers, and so it is hard to infer much about this dinosaur other than that it has been estimated to have been a medium sized ornithomimid. … Read more
In Depth Although only known from the incomplete remains of a juvenile, the dinosaur Siats seems to have been one of the larger theropod dinosaurs from North America. The partial remains of the holotype individual which mostly include elements of the hind quarters are estimated to have come from an individual dinosaur that was about … Read more
In Depth Parvicursor is a genus of alvarezsaur known to have lived in Mongolia during the Late Cretaceous. Like with some relatives, Parvicursor had hands reduced to a single stubby horn which was likely used to punch holes into termite mounds so that an individual Parvicursor could feed upon the termites within. Further Reading - … Read more
In Depth Much of Segnosaurus is still unknown and as such reconstructions of Segnosaurus are usually based with the addition of Erlikosaurus material to fill in the missing parts. Although very similar to one another, Segnosaurus has a key difference in the mouth in that the outer surface of the lower jaw begins at the … Read more
In Depth Although only currently known from partial snout remains, it is still enough material to declare Oxalaia a spinosaurid due to the unique nature of the snout. Spinosaurid teeth were also known from the fossil site before the current material was discovered, and may have belonged to Oxalaia in life. With its total length … Read more
In Depth When the dinosaur Afromimus was first described in 2017 it was as an ornithomimosaur, however a later study in 2019 led to Afromimus being described as an abelisaur, specifically a noasaurid. Unfortunately Afromimus is still only known from partial remains, making details of this dinosaur difficult to know for certain. Further Reading - … Read more
In Depth Aviatyrannis was for lack of a better word tiny, although this small size is actually a hallmark of tyrannosaur ancestry. Although incomplete, the fossil remains of Aviatyrannis are very similar to another ancient tyrannosaur, Stokesosaurus, from North America. This has resulted in speculation that Aviatyrannis is actually a junior synonym of Stokesosaurus, and … Read more
In Depth Aepyornithomimus is a genus of ornithomimosaurid dinosaur that lived in Asia during the late Cretaceous. Analysis of the foot of Aepyornithomimus shows an intermediate development between primitive and advanced ornithomimosaurs. Further Reading - First Ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of T�gr�giin Shiree, Mongolia. - Scientific Reports. 7: Article number … Read more