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 ().
Neosauropoda
Macronaria is defined as all neosauropods more closely related to "Saltasaurus loricatus" than "Diplodocus longus". This classification was introduced by Wilson and Sereno in 1998. Macronaria comes from the Latin for “large nose,” referring to the large external naris. The subgroup Titanosauriformes comprises all sauropods descended from the common ancestor of "Brachiosaurus" and "Saltasaurus". Macronaria is an exceedingly diverse clade, with members ranging in size from anywhere between six and thirty-five meters in length and sporting a broad array of body shapes. Some synapomorphies which have been used to characterize macronarians include flared neural spines on the dorsal vertebrae and nearly coplanar ischial distal shafts.