New evidence dinosaurs were strong swimmers

Apr 08, 2013

A University of Alberta researcher has identified some of the strongest evidence ever found that dinosaurs could paddle long distances.

Working together with an international research team, U of A graduate student Scott Persons examined unusual claw marks left on a river bottom in China that is known to have been a major travel-way for dinosaurs.

Alongside easily identified of many Cretaceous era animals including giant long neck dinosaur's researchers found a series of claw marks that Persons says indicates a coordinated, left-right, left-right progression.

"What we have are scratches left by the tips of a two-legged dinosaur's feet," said Persons. "The dinosaur's claw marks show it was swimming along in this river and just its tippy toes were touching bottom."

The claw marks cover a distance of 15 meters which the researchers say is evidence of a dinosaur's ability to swim with coordinated . The tracks were made by carnivorous theropod dinosaur that is estimated to have stood roughly 1 meter at the hip.

Fossilized rippling and evidence of mud cracks indicate that over 100 million years ago the river, in what is now China's Szechuan Province, went through dry and wet cycles. The river bed, which Persons describes as a "dinosaur super-highway" has yielded plenty of full foot prints of other and gigantic four-legged sauropods.

With just claw scratches on the to go with, Persons says the exact identity of the paddling dinosaur can't be determined, but he suspects it could have been an early tyrannosaur or a Sinocalliopteryx. Both species of predators were known to have been in that area of China.

Explore further: Remains of French ship being reassembled in Texas

More information: Persons is a U of A, PhD candidate and co-author of the research. It was published April 8 in the journal Chinese Science Bulletin.

add to favorites email to friend print save as pdf

Related Stories

Dinosaur shook tail feathers for mating show

Jan 16, 2013

(Phys.org)—A University of Alberta researcher's examination of fossilized dinosaur tail bones has led to a breakthrough finding: some feathered dinosaurs used tail plumage to attract mates, much like modern-day ...

Australia's stampeding dinosaurs take a dip

Jan 08, 2013

(Phys.org)—Queensland paleontologists have discovered that the world's only recorded dinosaur stampede is largely made up of the tracks of swimming rather than running animals.

Recommended for you

Remains of French ship being reassembled in Texas

Oct 24, 2014

A frigate carrying French colonists to the New World that sank in a storm off the Texas coast more than 300 years ago is being reassembled into a display that archeologists hope will let people walk over ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

Lurker2358
4 / 5 (2) Apr 08, 2013
I thought of this because of dino size for the larger species.

Think about how much time elephants and hippos spend in water. Elephants are the largest surviving land animal, and they spend alot of time in water, and when possible they even get deep in the water and play and stuff.

It's possible the water may relieve pressure on their bones by allowing their body mass the float some, buoy, etc.

Also, therapods could be ambush predators, so behaving similar to a modern crocodile or alligator may be an effective strategy for hunting.

Polar bears and other bears also spend a lot of time in or near the water, even though they are land animals. It just makes sense that big animals would spend a lot of time in or near water.