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 ().
Spinosauridae
Although reliable size and weight estimates for most taxa are hindered by the lack of good material, all known spinosaurids were large animals. The smallest, "Irritator", was between 6 and 8 meters in length and 1 tonne (1.1 short tons) in weight. While "Ichthyovenator", "Baryonyx", and "Suchomimus" ranged from 7.5 to 11 meters long, and weighing between 1 and 5.2 tonnes (1.2 and 5.7 short tons). "Spinosaurus" was the largest, capable of reaching lengths over 15 meters (49 ft) and weighing between 7 and 20.9 tonnes (7.7 and 23.0 short tons),even though the latest estimates suggest a weight of 6.4–7.2 tonnes (7.1–7.9 short tons). This consistency in large body size among spinosaurids could have evolved as a byproduct of their preference for semiaquatic lifestyles, as without the need to compete with other large theropods for food, they would have been able to grow to tremendous lengths.