The reconstructed skeleton of Giganotosaurus. Photo by Flickr user hoyasmeg.
What was Kelmayisaurus? Discovered in 1973, the lower jaw and partial upper jaw of this large, predatory dinosaur from the Early Cretaceous of China have been frustratingly difficult to interpret. Maybe Kelmayisaurus belonged to some obscure lineage of archaic theropod dinosaurs, or perhaps the fossils were simply parts of some other, already-known dinosaur. In a forthcoming Acta Palaeontologica Polonica paper, researchers Stephen Brusatte, Roger Benson and Xing Xu finally solve the mystery.
Read More Here