前面说的谭氏蛮龙私人标本“Elvis”
As the movie Jurassic World prepares to introduce a new generation to the menacing magnificence of dinosaurs, a recent discovery in Colorado appears ready to add an amazing and unexpected degree of reality to that film’s fictionalized account of prehistory.
It seems that 90 million years before the legendary Tyrannosaurus rex terrorized its Cretaceous landscape, an even larger and more powerful carnivorous dinosaur known as Torvosaurus was the unquestioned ruler of a real Jurassic world. With huge jaws filled with six inch long serrated teeth, scythe-like claws and an imposing size that allowed it to dominate its realm, some 150 million years ago, Torvosaurus was truly the King of Beasts.
Back in 2012, paleontologist Jason Cooper uncovered a horde of huge dinosaur bones at the privately-owned Skull Creek Quarry in Colorado’s famed Morrison Formation. At first, Cooper wasn’t sure how much of the dinosaur he had uncovered, or even what kind of dinosaur it was, but he immediately sensed this was something different… and something important. It took countless hours over the next three digging seasons to free the various bones from the ground, all still safely encased within their surrounding rock matrix. A veritable treasure trove of bones was eventually uncovered, a disarticulated puzzle of gigantic proportions that needed both additional expertise and labor before Cooper, or anyone else, knew exactly what had been found.
“It didn’t take long before we knew we had hit upon something special,” he said. “One day we came across this huge tooth embedded in matrix, and we suddenly realized that this just wasn’t another dinosaur. This was a Torvosaurus… and we were finding more of it than anyone had ever found before.”
Unless you earn your living working as a vertebrate paleontologist at a leading museum or university, you’ve probably never heard of this Mesozoic monster. In all honesty, up to now there’s been no particular reason for the name Torvosaurus (which translates to “savage lizard”) to have entered the popular lexicon, especially since no complete example of this fossilized beast has ever been found. Indeed, only scattered bits of bone and teeth have so far comprised our storehouse of known material, making this one of the most mysterious of giant prehistoric predators. Yet judging by the size and quantity of bones from this Torvosaurus specimen which has been nicknamed “Elvis” (it is, after all, a “King”), this amazing creature probably reached a size over 40 feet in length, larger than any known T rex.
Unearthing this beast was only the first step of the process, however. The task of assembling this monstrous Torvosaurus skeleton fell on the shoulders of Brock Sisson of Fossilogic, a Utah-based company geared for the discovery and preparation of dinosaur fossils. There, a team of workers toiled for months, carefully exposing the fossilized bones from within their sedimentary encasements and then placing the freed specimens on a steel armature in a manner best reflecting the latest scientific thought regarding the posture of “living” dinosaurs. When their task was completed those involved were astounded by what they saw… the Torvosaurus was approximately 55 percent complete (a high number in dino-terms), presenting a surprisingly detailed look at one of North America’s most secretive Jurassic beasts.
Not only were the huge pelvic and hind limb bones of the Torvosaurus present, but so were complete associated backbones which for the first time made possible an accurate estimate of the dinosaur’s immense size. Even more importantly, both maxillary and cranial elements of the Torvosaurus’ skull had been recovered. These bones are of particular scientific importance, and showed that this skull measured nearly 52 inches in length– comprising an astounding 18 percent of the dinosaur’s total size! Science has long known that theropod dinosaurs were the largest carnivores ever to walk on the face of Planet Earth, yet this specimen of Torvosaurus amazed paleontologists around the globe by proving it was the largest Jurassic theropod ever found.
里面说头骨长度测量接近52英寸(也就是1.32米),占整个恐龙尺寸的的18%

