135 Million Years Ago, by Canadian artist Michael Skrepnick

This painting illustrates two Jobaria fighting. The Jobaria on the right has just been cut on its shoulder by the thumb claw of the Jobaria on the left.

Because Jobaria are known to be herd animals, we speculate that they may have behaved as modern herd animals do. In this painting artist Michael Skrepnick has illustrated two Jobaria fighting with one another for dominance within the herd.

From the fossil record we know that Jobaria had an elongated thumb claw, but Dr. Sereno and his team believe Jobaria's thumb claw would not have been very useful fighting predators like Afrovenator. Instead, Jobaria's thumb claw may have been used in fights with one another.

Copyright © Project Exploration, Image © Michael Skrepnick