The bones of 2-metre-long tetrapod Whatcheeria reveal that it had an early growth spurt – a trait that was thought to have evolved later
28 November 2022
A large, crocodile-like animal that lived more than 340 million years ago was one of the earliest vertebrates to have a fast-growing phase in its youth.
Whatcheeria was an early tetrapod – one of the first vertebrates to have arms and legs instead of fins. At 2 metres long, it was one of the biggest carnivores of the era, and its anatomy hints that it snatched prey from the water by ambush, just like modern crocodiles. But how Whatcheeria reached such an impressive …