Brontosaurus
"Brontosaurus" was a large, long-necked quadrupedal animal with a long, whip-like tail, and forelimbs that were slightly shorter than its hindlimbs. The largest species, "B. excelsus", weighed up to and measured up to long from head to tail. For comparison, the current largest land animal, the average male African bush elephant is 3.20 m (10.5 ft) tall at the shoulder and has a body mass of 6,000 kg (13,228 lb) or 6.6 short tons.
Prestosuchus
Like other related prestosuchids, "Prestosuchus" had a deep skull and serrated teeth. "Prestosuchus" lived during the Middle Triassic in what is now Brazil. Initially it was estimated to be around 5 meters (17 feet) but a specimen discovered in 2010 suggest that Prestosuchus reached lengths of nearly 7 meters (23 feet) making it one of the largest raiusuchians alongside Saurosuchus and Fasolasuchus. While it resembled a dinosaur in having a large body and upright posture, it was actually a rauisuchian archosaur, more closely related to modern crocodilians.