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Arkansaurus measured about 4.6 metres (15 ft) long and weighed about 380.5 kilograms (839 lb). [8] [9] Examination of the holotype consisting of a nearly complete right foot suggests that Arkansaurus was similar to most ornithomimosaurians of the Early Cretaceous, with the strong curvature of the foot claws being the only exception: most ornithomimosaurians had flat claws. [7]
Size is an important aspect of dinosaur paleontology, of interest to both the general public and professional scientists. Dinosaurs show some of the most extreme variations in size of any land animal group, ranging from tiny hummingbirds , which can weigh as little as two grams, to the extinct titanosaurs , such as Argentinosaurus and ...
Size comparison of seven carcharodontosaurids (Acrocanthosaurus in light brown) Acrocanthosaurus was among the largest theropods known to exist, with an estimated skull length of 1.23–1.29 m (4.0–4.2 ft) and body length of 11–11.5 m (36–38 ft) based on the largest known specimen (NCSM 14345).
Ornithomimosauria ("bird-mimic lizards") are theropod dinosaurs which bore a superficial resemblance to the modern-day ostrich.They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period of Laurasia (now Asia, Europe and North America), as well as possibly Africa.
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Size comparison with an average human male Life restoration Archaeornithomimus was a medium sized ornithomimosaur, reaching 3.4 m (11 ft) long and weighing over 71.5 kilograms (158 lb). [ 18 ] [ 19 ] Solid evidence coming from other ornithomimosaurian relatives suggest that Archaeornithomimus was a feathered animal, with very ratite -like ...
English: A comparison of several size estimates for Deinosuchus, a giant Late Cretaceous crocodilian. The largest credible specimen of modern C. porosus (saltwater crocodile) is also included in the diagram for comparison, as is an average height human. Full citation information: Colbert, Edwin H; Bird, Roland T. (1954).
Argentinosaurus (meaning "lizard from Argentina") is a genus of giant sauropod dinosaur that lived during the Late Cretaceous period in what is now Argentina.Although it is only known from fragmentary remains, Argentinosaurus is one of the largest known land animals of all time, perhaps the largest, measuring 30–35 m (98–115 ft) long and weighing 65–80 t (72–88 short tons).