After some looking around, I've found what I believe to be the closest time and place for the prehistoric world of Terra Nova, with paticular attention payed to the dinosaur species, types, and sizes. Terra Nova's dinosaur species seem to most closely resemble, believe it or not, Early Cretaceous England from around 130 to 125 m.y.a. There were Brachiosaurs (Pelorosaurus), spinosaurids like the Empirosaur though a good deal smaller (Baryonyx), coelurosaurs like the Ovasaurs (Aristosuchus), ankylosaurs (Polacanthus), even dromaeosaurs (a.k.a. raptors) probably similiar to the Nikos (currently labeled under Ornithodesmus). While there were no abelisaurs like Carnotaurus present, a carnivor of similar size was running around (the Neovenator at 25 feet long, but closer in resemblence to an allosaur). As for the "slashers"? Well, there is a mysterious predator labeled a Valdoraptor that is currently only known from fossilized feet bones. But probably of a similiar build and size (around 15-18 feet long), whose to say it wouldn't have a crest on its head and talons on it's tail??? And just to cap it off, early Cretaceous England would have been an island with a tropical environment...just the kind of setting we see in Terra Nova (though probably without the high, sharp peaked mountains)!!!