Brontosaurus has always either been a genus or a younger sysnonym. The most prominent species of that genus has always been Brontosaurus excelsus, apart from th

Brontosaurus has always either been a genus or a younger sysnonym. The most prominent species of that genus has always been Brontosaurus excelsus, apart from the few years up to 2014, when it was Apatosaurus excelsus,