Triceratops

These horned beasts can grow to around 20ft long, making a bulky and often stubborn obstacle for anything that might attack them. The characteristic horns on its head provide the Triceratops with very effective defence, and a very dangerous thing to be charged down by.
In Port Nyanzaru they make effective beasts of burden, carrying or dragging heavy loads. Howdah's can be effectively mounted to their backs, allowing for multiple riders, and so they are often used as Transport beasts through the city and to surrounding locations. Furthermore, since once they're moving its hard to stop them, many Dinosaur Racers choose these beasts as their mounts for larger beast races, especially over long distance endurance events.