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 ().
Plesiosauria
In general, plesiosaurians varied in adult length from between to about . The group thus contained some of the largest marine apex predators in the fossil record, roughly equalling the longest ichthyosaurs, mosasaurids, sharks and toothed whales in size. Some plesiosaurian remains, such as a long set of highly reconstructed and fragmentary lower jaws preserved in the Oxford University Museum and referable to "Pliosaurus rossicus" (previously referred to "Stretosaurus" and "Liopleurodon"), indicated a length of . However, it was recently argued that its size cannot be currently determined due to their being poorly reconstructed and a length of thirteen metres is more likely. MCZ 1285, a specimen currently referable to "Kronosaurus queenslandicus", from the Early Cretaceous of Australia, was estimated to have a skull length of .