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Coprolites attributed to the archosaur Smok—a fearsome 5-meter-long bipedal predator with serrated teeth and powerful jaws—contained the crushed bones and teeth of its prey.

Crocodiles and birds share their heritage with dinosaurs, and together with pterosaurs they form a group known as archosaurs or "ruling reptiles," who date back to the Early Triassic.

Beyond just dinosaurs, other large archosaur predators during the same era also had unusual socket shapes.

But they would not be the first members of the broader family dinosaurs were members of, the archosaurs, to potentially make the switch.

In general, scientists thought body size remained similar among the first archosaurs - the larger reptile group that includes birds, crocodilians, non-avian dinosaurs, and pterosaurs - and the earliest ornithodirans.