At first it had no name. The beast was a mammal relative with a heavy skull, a mouth full of fangs, and a tall dorsal sail made of skin stretched over long struts of bone. Sinuous as a crocodile, ...

Dimetrodon, one of the most recognisable of the pre-dinosaur predators, is due a makeover. For more than a century, it has been depicted as a sluggish, belly-dragging beast with sprawling legs – but ...

Early Permian (295–270 Ma) sphenacodontid synapsids are of importance as they are the first large-bodied (up to 300 kg) apex predators in the evolutionary history of terrestrial amniotes 1. For 25 ...

Dimetrodon was the largest predator of its time, preying on giant amphibians nearly 300 million years ago during the Early Permian period. “They were eating basically whatever they wanted,” says ...