Subject designation: Stereosternum
"This Permian aquatic predator was one of the most challenging creatures to recreate in the history of the park. Due to its age, it was nearly impossible to properly reconstruct it using the DNA we had on hand. But we tried anyways. Using common stream lizard and yellow-bellied skink genes, we successfully managed to get a stable genetic sequence. However, the subject in question wasn't what we were hoping for. Because of the yellow-bellied skink DNA conflicted with the stream lizard one in terms of body anatomy, the genetic sequences for both repeated themselves several times before coming to a stable mix. But, by that time, we got an elongated serpent-like creature with almost vistigial hind legs and strong forelimbs, that was about 2m long as an adult (Stereosternum skeletons reached 80cm maximum for comparison). But, we decided that these were worth letting into the ecosystem, as the hypersaline lakes lacked an apex predator. So, Stereosternum are now the top predator of those regions, preying on their close relatives Mesosaurus, along with whatever they can get their jaws on."

Here’s a link to the deviantart account of Matkoc the talented artist behind this streamline and elegant aquatic piece of artwork for those wanting to check it out:

https://www.deviantart.com/matkoc