Once the fossils are cleaned, Dr. Sereno and his team are able to determine which of Jobaria's bones are damaged or missing. In the case of Jobaria, they had discovered almost all of the skeleton - more than 95%. The missing 5% of the skeleton had to be sculpted out of foam or in clay.

In the above photo, Dr. Sereno is holding the juvenile skull of Jobaria. The reddish parts of the skull are "missing bones" that have been recreated in clay, modeled after their symmetrical opposites or reduced in size from the adult skull. Dr. Sereno explains this process in the above Quicktime video.