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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.
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 ...
Restoration. Barsboldia was a large hadrosaur, previously estimated at 10 metres (33 ft) in length and 5 metric tons (5.5 short tons) in body mass. [2] In 2011, the tibial length was measured at 1.4 m (4.6 ft), rivaling that of Shantungosaurus at 1.47 m (4.8 ft) and that of Magnapaulia at 1.36 m (4.5 ft); this indicates that Barsboldia could have possibly reached within the range of 12–14 ...
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.
A nearly identical EQ range of 2.3 to 3.8 was found, and it was again noted this was higher than that of living reptiles, sauropods and other ornithischians, but different EQ estimates for theropods were cited, placing the hadrosaur numbers significantly below even more basal theropods like Ceratosaurus (with an EQ range of 3.31 to 5.07) and ...
The South American hadrosauroid Gonkoken appears to have diverged from North American hadrosauroids at an even earlier time, about 91 million years ago in the Turonian. [4] The North American titanosaur Alamosaurus may have experienced a similar dispersal events from relatives in South America in the late Campanian–early Maastrichtian. [10]
This is an incomplete list that briefly describes vertebrates that were extant during the Maastrichtian, a stage of the Late Cretaceous Period which extended from 72.1 to 66 million years before present. This was the last time period in which non-avian dinosaurs, pterosaurs, plesiosaurs, and mosasaurs existed.
The Edmontosaurus mummy SMF R 4036 is an exceptionally well-preserved dinosaur fossil in the collection of the Naturmuseum Senckenberg (SM) in Frankfurt am Main, Germany. Found in 1910 in Wyoming , United States, it is ascribed to the species Edmontosaurus annectens (originally Trachodon ), a member of the Hadrosauridae ("duckbilled dinosaur").