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Illustration. First described in 1973, [3] Shantungosaurus is known from over five incomplete skeletons. Chinese scientist Xing Xu and his colleagues indicate that Shantungosaurus is very similar to and shares many unique characters with Edmontosaurus, forming a node of an Edmontosaurus–Shantungosaurus clade between North America and Asia, based on the new materials recovered in Shandong.
As a result of this, the name Hadrosaurinae was dropped or restricted to Hadrosaurus alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. [1] Recent phylogenetic work by Hai Xing indicates that Hadrosaurus is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. [ 2 ]
Two specimens still under study in the collection of the Museum of the Rockies - a 7.5 m (25 ft) tail labelled as MOR 1142 and another labelled as MOR 1609 - indicate that Edmontosaurus annectens could have grown to much larger sizes and reach nearly 15 metres (49 ft) in length, [49] [50] similar to the closesly related Shantungosaurus which ...
In 1977 James Hopson introduced the use of estimated encephalization quotients to the topic of dinosaur intelligence, finding Edmontosaurus to have an EQ of 1.5, above that of other ornithischians including earlier relatives like Camptosaurus and Iguanodon and similar to that of carnosaurian theropods and modern crocodilians but below that of ...
Jurassic genus Camptosaurus was small, no more than 5 metres (16 ft) in length and half a tonne in weight. [4] The largest known ankylopollexian, dating to the late Campanian age (around 70 million years ago), belonged to the hadrosaurid family, and is named Shantungosaurus. It was around 14.7 metres (48 ft) to 16.6 metres (54 ft) in length and ...
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The largest known land-dwelling artiodactyl was Hippopotamus gorgops with a length of 4.3 m (14 ft), a height of 2.1 m (6 ft 11 in), and a weight of 5 t (11,000 lb), [66] with its closely related European descendant, Hippopotamus antiquus, rivaling it, estimated to be 14.1 ft (4.3 m) in length and 7,700–9,300 lb (3,500–4,200 kg) in weight.