Where was the triceratops in the food chain?

Triceratops was a 6 to 12 tonne herbivore from the maasrichtian period at the end of the cretaceous period 65 million years ago in what is now North America.

It filled the role that modern day wilderbeast or maybe buffalo do in Africa today. Fossil evidence suggest that they were predated by large carnavores such as Tyrannosaurus Rex (although some theories suggest that T-Rex was a scavenger).