Dinosaurs from Mississippi that resemble ostriches are among the biggest in the world, weighing over 800 kg have been revealed. The understanding of dinosaur environments in eastern North America is also improved by the findings.
In this work, Chinzorig and associates describe fresh ornithomimosaur fossils from the Late Cretaceous Eutaw Formation of Mississippi.Ornithomimosaurs, or "bird-mimic" dinosaurs, were ostrich-like in appearance, with small heads, long arms, and strong legs.
They estimate the larger species weighed more than 800kg, and the individual studied was most likely still developing when it died. This makes it one of the largest ornithomimosaurs yet discovered. "The co-existence of medium- and large-bodied ornithomimosaur taxa during the Late Cretaceous Santonian of North America does not only suggest broader evidence of multiple cohabiting species of ornithomimosaurian dinosaurs in Late Cretaceous ecosystems of Laurasia, but it also provides key information on the diversity and distribution of North American ornithomimosaurs from the Appalachian landmass," said the authors.
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