Read more: Click here to read the original, longer version of this story. IT’S T. rex‘s bizarre vegetarian relative. Chilesaurus diegosaurezi was discovered in southern Chile where it lived around 150 million years ago (Nature, doi.org/34t). Strikingly, it looks like a mosaic of several other dinosaurs. It had a tiny head, a 3-metre-long body and small arms like T.rex – but with blunt fingers instead of raptorial claws. And unlike T. rex, it had broad hind feet more like those of Diplodocus, while its pelvic girdle tipped back like that of Triceratops. “Chilesaurus constitutes one of the most bizarre dinosaurs ever found,” says Fernando Novas of the Argentine Museum of Natural Sciences in Buenos Aires. “It doesn’t belong to any recognised theropod lineages, but represents an evolutionary jigsaw puzzle.” The find challenges the prevailing theory that theropods were first carnivores, and only evolved into lumbering herbivores much later. This article appeared in print under the headline “Jigsaw dinosaur has bits of many others”More on these topics: