504 Documentary #2 - Research; World-Building

 Since I know more about dinosaurs to begin with and understand where to look, I took on researching to create a pool of other dinosaurs from South America dated to the Late Cretaceous that the team can draw on later.

The first place I started was the La Colonia Formation, where the only Carnotaurus fossil was found. Not a great deal was there, but some fossil pieces had been identified as abelisaurid and hadrosaurid in nature. I moved on to looking through other rock formations in Argentina.

I was able to collect a number of identified species. 

Abelisaurus was a very close relative of Carnotaurus, but smaller, so I noted it down as possibly being a predator to a young Carno or a rival predator to a young adult or juvenile Carno.

Noasaurus was a close relative of Abelisaurids, but much smaller. Although very few fossils have been found, it's currently been reconstructed based on its other relatives, theorised to eat fish. It could possibly be a world-building species to help populate the environment.

Neuquenosaurus was a small sauropod, which I noted as a possible prey source for the Carno from a young age.

Saltasaurus was a type of Titanosaur known from fossilised osteoderms and nesting sites, showing it was heavily armoured. It's a little bigger than a full grown Carno, so it could be a dramatic fight between prey and predator or possibly to use in parallelism, a young Carno trying and failing to eat one but when he reaches full size he takes one down to establish he is at his peak strength.

Antarctosaurus is another type of Titanosaur, although a controversial type as so little has been found of it, it's debated as to whether it exists or the fossils were an already known species. Since it's size massively outshines any predators of the time period or place, only the young or dying would be likely prey, so if it is included, it will most likely be used to establish the scale of the world.

Secernosaurus was a hadrosaurid. At it's full size, it was slightly bigger than Carnotaurus, so younger specimens may serve as prey, but other than that can help populate the world.

I specifically started searching for pterosaurs, as I wanted something to populate the skies, however there isn't a great deal of fossil pterosaurs in Argentina. I was able to find two dated to the Late Cretaceous, Aerotitan and Argentinadraco, however both have so little fossil remains, constructing a whole, accurate model is pretty much impossible. Phylogeny could be used to help create a semi-accurate look that could at least stand up until more evidence is found. I expanded my search a bit further north, finding the Caiuajara, which has much better fossil evidence showing a more interesting skull structure. However, it did live further north and it's habitat is arid desert, so I noted it could possibly be used in a 'wandering' section of the narrative when the Carno is searching for viable territory.

Quilmesaurus was another relative of Carnotaurus, but much smaller than even Abelisaurus, so I noted that it could possibly be a predator to the Carno in it's infancy.

Unenlagia was possibly the same creature as Neuquenraptor, and Austroraptor were smaller than even a full grown human, so I noted they could be used early on to show the scale of Carnotaurus and build up an 'untouchable predator' visual, then later scavenge the dead Carno as the cycle of life and death in nature - no matter the size and strength of even the toughest predator, everything falls prey to something else in the end.