In Depth The discovery of Gilmoreosaurus began in 1923 when the first fossil remains were discovered. These remains were however referred to the genus Mandschurosaurus as a new species, which is where they remained until a study by Brett-Surman in 1979 saw them re-identified as a distinct genus separate from Mandschurosaurus. Later in 1995, two … Read more
In Depth Although not very well known, Jaxartosaurus possesses a hollow helmet shaped crest on top of its skull similar to the better known Corythosaurus. Because this crest is hollow, Jaxartosaurus had been confidently assigned to the Lambeosaurinae group of hadrosaurs which are typified by their hollow crests. The crest of Jaxartosaurus like its lambeosaurine … Read more
In Depth When described in 2015, Probrachylophosaurus made headlines around the world, when it was often dubbed ‘superduck’. This was because Probrachylophosaurus was proposed to be the transitional link between the non-crested genus Acristavus, and the later Brachylophosaurus which has a flat paddle shaped bony crest. Probrachylophosaurus itself has a much smaller triangular crest which … Read more
In Depth Datonglong is a genus of hadrosauroid dinosaur that lived in China during the late Cretaceous. Unfortunately not much is known about this genus because only a jaw is known, however the teeth are noted as attaining lengths of up to five and a half centimetres. Datonglong should not be confused with the predatory … Read more
In Depth Bactrosaurus is one of the earliest hadrosauroids known from Asia, and also one of the best known. Bactrosaurus still had three stacked teeth for each tooth in the maxilla, an iguanodont feature that reveals the ancestry of the genus. However, Bactrosaurus also has a number of hadrosauroid features, particularly those of lambeosaurines (hollow … Read more
In Depth Tethyshadros is without doubt one of the more interesting genera of hadrosauroid dinosaurs. For a start hadrosauroids are not particularly well known from Europe, though large ornithopod dinosaurs which were ancestral to them are. Tethyshadros also seems to have been a dwarf hadrosaur, growing to an average length of four meters. This reduction … Read more
In Depth Huehuecanauhtlus easily has one of the hardest genus names to pronounce of any dinosaur. That aside, Huehuecanauhtlus was a genus of hadrosauroid dinosaurs that lived in what is now Mexico during the late Cretaceous. The region that the Huehuecanauhtlus holotypes are known from would have been near the southern tip of the landmass … Read more
In Depth Zhanghenglong was described at the time of its description as a non-hadrosaurid hadrosauroid, which translated into simpler terms is a primitive hadrosaur. Hadrosauroids like Zhanghenglong were descended from the older iguanodont ornithopods that rose to prominence during late Jurassic and early Cretaceous. By the earlier stages of the late cretaceous that had evolved … Read more
In Depth The first Brachylophosaurus remains were discovered in Alberta in 1936, but were not named until 1953 when Charles Sternberg made the description. A second species of Brachylophosaurus was named as B. goodwini by Jack Horner in 1988; however the wider consensus today is that these individuals are actually further individuals of the genus … Read more
In Depth Koshisaurus is a genus of primitive hadrosauroid dinosaur from the early Cretaceous of Japan. At the time of writing all known remains of Koshisaurus are partial as well as probably representing juvenile or sub adult individuals, both of which are factors that make it difficult to ascertain how big this dinosaur could grow. … Read more