Quasimodo dino leaves experts grappling for a hunch

September 8, 2010
Handout photo released by Nature magazine and the Universidad Nacional de Educacion shows the reconstitution of a new species of dinosaur, Concavenator corcovatus, with an unusual hump-like structure of the vertebrae and a series of small bumps on the ulna, discovered in Spain according to a study published today by Nature Magazine.

Palaeontologists in Spain have discovered the remains of a strange dinosaur with a hump that they believe is the forerunner of flesh-eating leviathans which once ruled the planet.

The fossil was uncovered in the Las Hoyas formation in central Spain's Cuenca province, a treasure trove of finds that date to the Lower of between 120 and 150 million years ago.

The nearly-complete skeleton is as exquisite as the dinosaur is "bizarre," Fernando Escaso of the Autonomous University of Madrid, told AFP by phone.

"This dinosaur is very remarkable," Ecaso said.

"It is a unique specimen. It is the most complete dinosaur ever found in the and is a new species of theropod," a carnivore that moved on two rear limbs.

Six metres (20 feet) long from snout to tailtip, the dinosaur is the earliest member ever found of a branch of Carcharodontosauria, the largest predatory dinos that ever lived and which until now were thought to be confined to southern continents.

The lineage expanded hugely over the aeons, both in size and number of species.

Its numbers include Giganotosaurus, estimated up to 14.5m (47 feet) long, and Carcharodontosaurus, up to 13 metres (44 feet) long, and each weighing some seven or eight tonnes.

The new find has jaws and small, clawed forelimbs that bear a resemblance to the which belongs to a different dinosaur family.

But all similarities end with the spine, which is astonishingly curved and has a small hump, Ecaso said.

"It is the first time we have ever seen a structure like this on the spine of a dinosaur, although it is common on some animals today, such as cows," Escaso said.

"At the moment, the function of this structure is unclear. We believe that the animal was not diseased because the spine shows no sign of being cracked or broken, we think it is a feature of this species. One hypothesis is that it was a reservoir of fat."

The new species has been named Concavenator corcovatus, from "Conca," the Latin word for Cuenca; "venator," for hunter; and "corcovatus," or hump-backed.

The study is published on Thursday by the British science journal Nature.

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5 / 5 (1) Sep 08, 2010
If is it something like the hump on a Brahma cow or even a camel it would not be pointy as it is illustrated. So does the illustration bear any resemblance to the fossil or is it based on artists impressions like the ones we often see of planets or star systems that are too far away to actually see.
not rated yet Sep 08, 2010
bison have long vertebra on their upper back. besides storing fat and mass above the lungs for insulation, it also makes it harder for a carnivore to reach the neck from above. many hadrosaur skeletons show tooth marks in the area of that hump, perhaps it was used the same way as bison.
not rated yet Sep 09, 2010
It evloved to allow the creature to detect the ceiling height of dark places like caves and undergrowth. Notice its hunched forward stance. The hump would be the tallest part of it as it foraged the floor for smaller prey, while the tail was actually usually down and swaying left to right, so that it wouldn't give itself away, which it would if it were pointing straight up.

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