Dinosaur cleared of cannibalism slur
IAN SAMPLE
Fossil hunters have unearthed what they believe to be the oldest example of defamation of character amid a collection of bones dating back 210 million years.
The victim of the slur is the earliest well-known dinosaur, the slender biped Coelophysis bauri, which gained notoriety in the 1950s as a cannibal content to feed even on its own young.
Earlier assumption
The dinosaur's dietary behaviour emerged when palaeontologists working in Ghost Ranch, New Mexico, uncovered an enormous bone bed containing the skeletons of hundreds of Coelophysis. Some appeared to have remnants of their own kind in their stomach regions.
The tale has become one of the most widely covered from prehistory and has been perpetuated in children's books and museum exhibitions. At the Natural History Museum in London, the Dino Jaws display shows a Coelophysis tucking into a juvenile shortly after it has clambered from an egg.
But in research published recently, palaeontologists at the American Museum of Natural History claim the Coelophysis has been badly wronged.
They re-examined the fossils found in New Mexico and concluded that although Coelophysis was a meat eater, there was no evidence it was a cannibal after all. Two skeletons in particular cleared the Coelophysis' name.
One, a near complete adult , was previously believed to have a leg bone from its own species in its stomach.
But the latest study published in Biology Letters shows the size of the leg and the positioning of the adult makes it almost certain the adult merely died on top of the limb rather than ingested it.
Further evidence
A second adult skeleton added further evidence of Coelophysis' good character. Bones confirmed to be inside the dinosaur's stomach were analysed and found to be from an entirely different species.
"Coelophysis is held up as the foremost example of cannibalistic behaviour in dinosaurs, but our work suggests that isn't true," said Sterling Nesbitt who led the study.
Because there is little other evidence that dinosaurs engaged in cannibalism, the researchers conclude it may have been extremely rare or non-existent. . —
Printer friendly
page
Send this article to Friends by
E-Mail
Sci Tech
