This is incorrect. The name "brontosaurus" is incorrect. But the nomenclature correction to apatosaurus did not come with any change in our understanding of the species.

While that which was labelled brontosaurus was later subsumed into the previously identified genus apatosaurus the early reconstructed fossil which popularized our image of the brontosourus was also discovered to include a head based of models of camarasaurus skulls. That and it was supposedly forced to live in the water because it was too large to support itself on land. Basic... (read more)