User blog comment:Granditamias/Did InGen clone old species in 1999?/@comment-33613830-20190119022336

Your theory is very interesting, as the JP3 Velociraptors, Pteranodons (and possibly), Brachiosaurus could have been cloned alongside the four illegal species.

The second fetus was definitely a T. rex, as it was confirmed not long ago. The other two are a mystery.