9949 Brontosaurus
This minor planet was named after Brontosaurus, a gigantic quadruped sauropod dinosaurs, which walked on all four legs and lived in the Upper Jurassic. Adult individuals measured up to 20 meters and had a weight of up to 20 tons. Many Fossils have been found in the United States. Brontosaurus is one of the best-known dinosaurs. The official naming citation was published by the Minor Planet Center on 20 November 2002 ().
Brontotheriidae
The evolutionary history of this group is well known, due to an excellent fossil record in North America. The earliest brontotheres, such as "Eotitanops", were rather small, no more than a meter in height, and were hornless.