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 ().
Argentinosaurus
Not much of "Argentinosaurus" has been recovered. The holotype (specimen number, PVPH-1) included only a series of vertebrae (six from the back, five partial vertebrae from the hip region), ribs of the right side of the hip region, a part of a rib from the flank, and the right fibula (lower leg bone). One of these vertebrae was 1.59 meters tall, and the fibula was about 1.55 meters (61 inches). In addition to these bones, an incomplete femur (upper leg bone, specimen number MLP-DP 46-VIII-21-3) is assigned to "Argentinosaurus"; this incomplete femur shaft has a minimum circumference of about 1.18 meters. The completed femur is estimated at around 2.5m long. By comparison, there are complete femurs preserved in other giant titanosaurs; "Antarctosaurus giganteus" which measures 2.35m, and "Patagotitan mayorum" which measures 2.38m.