In Depth Maip is a genus of megaraptorid dinosaur that lived in South America during the Late Cretaceous, and going by the size of the fossil bones, potentially one of the largest megaraptorid dinosaurs so far discovered. The describing authors of Maip also considered the presence of potential attachment points of ligaments upon the ribs. … Read more
In Depth Bicentenaria is an interesting theropod whose remains were recovered from the Ezequiel Ramos Mexia Reservoir, Rio Negro Province, Argentina by Raul Spedale in 1998. The remains were of a concentration of disarticulated remains of many individuals, but their similarity to one another strongly suggests that they were all from the same genus of … Read more
In Depth Erliansaurus is a genus of primitive therizinosauroid from the late Cretaceous of Mongolia, and the fact that the holotype comes from around the late Campanian and early Maastrichtian is an indication that Erliansaurus was a late surviving form that managed to exist in Asia at a time when other more advanced therizinosaurs were … Read more
In Depth Tralkasaurus was named from very partial fossil remains, so it is hard to be certain and the full life features of this dinosuar. At the time of discovery, what can be said is that Tralkasaurus seems to have been an abelisaurid theropod, and one that seems to have been smaller than most other … Read more
In Depth Siamraptor is a genus of carcharodontosaurid dinosaur that lived in Asia during the early Cretaceous. The holotype individual of Siamraptor is only known from a partial skull, jawbone and a few post cranial bones, so precise details or any unusual features if they existed, are still unknown. These scattered bones however do indicate … Read more
In Depth Dryptosaurus aquilunguis first started off being known as Laelaps aquilunguis when it was first named in 1866 by Edward Drinker Cope, and under the name Laelaps it was one of the first North American dinosaurs to be named. Cope chose the name Laelaps after a dog in Greek mythology which always caught what … Read more
In Depth First discovered in the Canadian Province of Alberta by Irene Vanderloh in 1974 and named by Hans-Dieter Sues in 1978, Saurornitholestes was a small dromaeosaur that is thought to have been similar to the Asian Velociraptor in form. In 2006 a second species called Saurornitholestes robustus was named by Robert Sullivan. The ‘robustus’ … Read more
In Depth Compsosuchus is considered to be a very dubious genus of dinosaur, not only due to the incomplete remains but the fact that Charles Alfred Matley and Friedrich von Huene also named two other dinosaurs, Indosaurus and Indosuchus that combined with Compsosuchus may actually represent the same genus. Compsosuchus has been considered to be … Read more
In Depth Neimongosaurus is a genus of therizinosaur that lived in Asia during the late Cretaceous. Like other therizinosaurs, Neimongosaurus was descended from meat eating theropods, though the teeth in the lower jaw of Neimongosaurus which have coarse serrations which indicate that Neimongosaurus were plant eaters. Neimongosaurus has occasionally been classed as a member of … Read more
In Depth Deltadromeus was a mid-sized theropod that lived in North Africa, but while the time period it is known from places it in the late (or alternatively upper) Cretaceous, it actually roughly lived during the middle of this period. The skull of this dinosaur is so far unknown but the recovered post cranial remains … Read more