What is your goal? If it is to educate others, then we can improve your approach.
What do you figure most people think of when hearing ‘large dinosaurs’? Not the ‘largest’, but the ones that have captured people’s imagination.
A stronger approach would have been to identify that there are classes of dinosaurs that are far larger than the ones commonly thought of. That may actually be welcomed by your audience, instead of coming off as a pedant.
