A discovery suggests that an ancient species acquired a key evolutionary innovation before a mass extinction event, enabling related creatures to dominate the Earth for millions of years.
, as it is known, is thought to have resulted from an intense period of volcanic activity that spewed out vast quantities of greenhouse gases, ash and other debris, which led to significant global warming as well as other environmental effects such as ocean acidification.
The species is one of the earliest relatives of the archosaurs—a group of animals that includes the extinct non-avian dinosaurs and pterosaurs, as well as birds and crocodiles.has several bodily features indicating that it likely walked upright on all fours rather than in a sprawling stance seen in today's lizards, that walk with their limbs extended to the sides and bellies almost touching the ground.
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