cardex

Tyrannosaurus mcraeensis

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The ancestral species to the larger and more famous Tyrannosaurus rex. T. mcraeensis lived in the Hall Lake Formation of New Mexico during the Campanian stage of the Late Cretaceous. Tyrannosaurus mcraeensis predates Tyrannosaurus rex by 7 million years. Giant members of the tribe Tyrannosaurini evolved in southern Laramidia.

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The ancestral species to Tyrannosaurus rex. Tyrannosaurus mcraeensis coexisted with Sierraceratops since Triceratops didn’t exist in the Campanian.

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