Dinosaur had record number of bone problems and lots of pain

February 26, 2016 by Bob Yirka, Phys.org report
Credit: PLOS ONE

A pair of researchers has found that a dinosaur unearthed in Arizona back in 1942, had a record number of injuries and bone growth problems. In their paper published in the open access site, PLUS ONE, Phil Senter, with Fayetteville State University and Sara Juengst with Appalachian State University describe the condition of the dinosaur and suggest that it very likely had problems hunting and was almost certainly in a lot of pain for the latter period of its life.

In examining the dinosaur (Dilophosaurus wetherilli) the researchers found eight places where bones were either broken or were damaged through infections, they included: a fractured left shoulder blade, fractured left radius, an infection in its left ulna, two areas of damage due to in its left thumb, an injury to its right humorous and two examples of osteodysplasia, where the bone was deformed due to unusual growth.

The researchers theorize that several of the injuries likely occurred as the result of a single fight, from broken bones to infections due to piercings. There were also parts of bones that were simply missing—prior research has shown that unlike mammals, were unable to re-grow lost bone. But, the dino clearly survived, for months or even years, as all of the injuries showed signs of healing. The researchers surmise that the dino likely had to live off smaller prey while it healed, which presumably led to weight loss and it would have walked with a noticeable limp for the rest of its life; it also would have had to make use of permanently twisted 'fingers' presenting an overall challenging existence. With all of its injuries, they note, the dinosaur was probably in a lot of pain.

D. wetherilli had large back legs used for walking and running and very small front legs, likely used for fighting or killing prey. It also had a split cranial crest and an empty expanse behind the first row of teeth—they typically measured approximately 20 feet long and weighed approximately 1,100 pounds—the sample under study was found in a rock formation and has been dated back to time between 190 and 183 million years ago.

Explore further: New dinosaur species unearthed in Venezuela

More information: Phil Senter et al. Record-Breaking Pain: The Largest Number and Variety of Forelimb Bone Maladies in a Theropod Dinosaur, PLOS ONE (2016). DOI: 10.1371/journal.pone.0149140

Related Stories

New dinosaur species unearthed in Venezuela

October 8, 2014

(Phys.org) —A team of paleontologists with members from Brazil, Venezuela, the U.S. and Germany has found fossil evidence of a previously unknown dinosaur in Venezuela. In their paper published in the journal Royal Society ...

New evidence for combat and cannibalism in tyrannosaurs

April 9, 2015

A new study documents injuries inflicted in life and death to a large tyrannosaurine dinosaur. The paper shows that the skull of a genus of tyrannosaur called Daspletosaurus suffered numerous injuries during life, at least ...

Revealing the healing of Dino-sores

May 6, 2014

Scientists have used state-of-the-art imaging techniques to examine the cracks, fractures and breaks in the bones of a 150 million-year-old predatory dinosaur.

Could big dinosaurs swim? Scientists follow the footprints

February 24, 2016

How far can you trust a footprint? Dinosaur footprints are fascinating but there's a question over how reliable they are at providing information about the palaeobiology of the creatures that made them. While certain prints ...

Recommended for you

Lifting barriers to citizenship for low-income immigrants

January 15, 2018

Taking the Oath of Allegiance at a naturalization ceremony is an emotional moment for many immigrants, and for good reason: it is the culmination of an often arduous process and many years of striving. Citizenship also opens ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.