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Description
A Bistahieversor sealeyi (9 m) attacking a Parasaurolophus tubicen (10 m), Utah, 75 million years ago.
As I mentioned before, North America`s megafauna from the Campanian is quite plentiful and well understood. Amongst it we have quite a varied number of different tyrannosaur species.
While Tyrannosaurus rex seems to have held a monopoly troughout the western landmass known as Laramidia as its sole apex predator during the Maastrichtian, the Campanian shows a much grander variety of tyrannosaur species that seem to have diverged and been segregated geographically.
Both the Kaiparowits Formation and the Kirtland Formation from the American south-west show us a whole host of similar, but still different dinosaurs from those found in Alberta and Montana at around the same time.
Among them is Bistahieversor sealeyi. At 9 m long and 2.5 tons in weight, it was the largest land predator in southern Laramidia 75 million years ago, with only Teratophoneus curriei (assuming the 6 m long holotype was indeed a subadult) being potential competition.
Like most giant tyrannosaurs, it would have gone after the very big ceratopsians, hadrosaurs and ankylosaurs that roamed the Four Corners during the Campanian.
As I mentioned before, North America`s megafauna from the Campanian is quite plentiful and well understood. Amongst it we have quite a varied number of different tyrannosaur species.
While Tyrannosaurus rex seems to have held a monopoly troughout the western landmass known as Laramidia as its sole apex predator during the Maastrichtian, the Campanian shows a much grander variety of tyrannosaur species that seem to have diverged and been segregated geographically.
Both the Kaiparowits Formation and the Kirtland Formation from the American south-west show us a whole host of similar, but still different dinosaurs from those found in Alberta and Montana at around the same time.
Among them is Bistahieversor sealeyi. At 9 m long and 2.5 tons in weight, it was the largest land predator in southern Laramidia 75 million years ago, with only Teratophoneus curriei (assuming the 6 m long holotype was indeed a subadult) being potential competition.
Like most giant tyrannosaurs, it would have gone after the very big ceratopsians, hadrosaurs and ankylosaurs that roamed the Four Corners during the Campanian.
Image size
3443x1861px 2.75 MB
Date Taken
May 18, 2018, 5:45:40 PM
© 2018 - 2024 ThalassoAtrox
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