But that to me is a huge problem. For instance, ever heard of the documentary Jurassic Fight Club? Never mind the series' own flaws, but why is it called Jurassic Fight Club? It doesn't only feature dinosaurs of the Jurassic and frankly, I think the title is lousy.
Also, going back to Primal Carnage, as I mentioned earlier; prime example. The T.Rex not only looks almost identical to the JP Rex, but has a roar that is more or less a modified roar of the JP Rex (much like the Rex in Dino Crisis 1 and 2 does). The Velociraptor is a direct copy of the JP raptor, and the Dilo could almost be the same thing, given its size and the fact that it spits venom.