AboutDavid Prus Expertise I can answer any general questions about dinosaurs and on prehistoric mammals in the Cenozoic. I also know a bit about the media's various depictions of dinosaurs and their inaccuracies. I don't know much about "microfauna"-small animals, or about Paleozoic besides some knowledge about Permian animals. Plants are right out, I'm afraid.
Experience I have been interested in dinosaurs for most of my life, own a large collection of scientific papers and books on the subject, and am a member of the Field Museum in Chicago.
Education/Credentials I am in college, but studied biology and geology both in high school and as a personal effort.
Question hi what was the main prey of giganotosaurus and carcharodontosaurus? did they preyed on large ornithopods like iguanodontids? did carcharodontosaurus interacted with deltadromeus and how could these large predators co-exist in the same area?
Answer In their areas, there were mostly sauropods called Titanosaurs. Their contemporary ornithopods were much smaller and rarer, and probably hunted less often. Carcharodontosaurus probably was top predator in its habitat. Often, when there are multiple predators in the same area, they hunt different prey or use different techniques. For example, leopards and lions coexist, but take very different prey. Carcharodontosaurus shared its habitat with Deltadromeus and Spinosaurus, and they all probably had different niches. Carcharodontosaurus was probably a hunter of adult sauropods, while Deltadromeus may have acted as a pack hunter, a scavenger, and hunted young sauropods and the iguanodont Ouranosaurus and Spinosaurus could have been a generalist that probably relied on fishing and scavenging, but could kill small prey.
