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 ().
Evolution of dinosaurs
Heterodontosauridae has been shown to be the basalmost group within Ornithischia. Heterodontosaurids are very small (body length < 1 m) and lived from the Late Triassic to Early Cretaceous. Apart from "Abrictosaurus" all have a short upper canine and longer lower canine. The forelimbs in known fossils are relatively long.