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Palaeontology

New dinosaur had tiny little arms like T.rex

By T.K. Randall
July 16, 2016 · Comment icon 8 comments

What were these tiny arms used for ? Image Credit: CC BY-SA 3.0 Scott Robert Anselmo
The fossil remains of a whole new species of carnivorous dinosaur have been unearthed in Argentina.
Dating back 90 million years and measuring 7.6 meters in length, this prehistoric meat-eater, which has been named Gualicho shinyae, was discovered at a site in northern Patagonia.

Perhaps the most interesting thing of all about this new species was its relatively tiny arms which were very similar to those of Tyrannosaurus rex despite the fact that they were not closely related.

This suggests that Gualicho's arms actually evolved independently from other theropods.
"It's really unusual," said co-author Peter Makovicky. "It's different from the other carnivorous dinosaurs found in the same rock formation, and it doesn't fit neatly into any category."

There has been much debate in recent years over exactly how T.rex would have used its tiny arms with theories ranging from grabbing squirming prey to holding on to a female while mating.

It is certainly not unreasonable to suggest that Gualicho used its arms in much the same way.

Source: BBC News | Comments (8)




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Recent comments on this story
Comment icon #1 Posted by Gecks 8 years ago
Very cool they found a new species. How marvelous it would have been to see these animals in the flesh.
Comment icon #2 Posted by Twin 8 years ago
Just a guess, but I think they may have used the arms as toothpicks.  
Comment icon #3 Posted by CigaretteSmokingMan 8 years ago
Poor guys couldn't even scratch their own balls.
Comment icon #4 Posted by Zalmoxis 8 years ago
Shriveled appendages, not useful but a good cue for further evolutionary development. It's a start I guess.
Comment icon #5 Posted by Likely Guy 8 years ago
Think before you post.
Comment icon #6 Posted by CigaretteSmokingMan 8 years ago
Comment icon #7 Posted by CigaretteSmokingMan 8 years ago
Think about what?
Comment icon #8 Posted by Gingitsune 8 years ago
That birds and lizards (and probably dinosaurs) have no external testicles, only mammals have them. 


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