Dinosauria › Saurischia › Sauropodomorpha › Sauropoda Diplodocidae Whip-tailed sauropods: Diplodocus, Apatosaurus, Brontosaurus. Seismosaurus 157.9–143.1 Mya · Unknown locality Gigantosaurus 157–152 Mya · United Kingdom Brontosaurus excelsus 156–146 Mya · North America Apatosaurus ajax 155–150 Mya · North America Diplodocus carnegii 155–145 Mya · North America Galeamopus hayi 155–152.9 Mya · United States Elosaurus 154.8–143.1 Mya · Unknown locality Eobrontosaurus 154.8–143.1 Mya · Unknown locality Ultrasauros 154.8–143.1 Mya · Unknown locality Supersaurus 153–145 Mya · North America Dystylosaurus edwini 152.2–145.1 Mya · Unknown locality Barosaurus 152–150 Mya · Mexico Dinheirosaurus lourinhanensis 152–150 Mya · Portugal Ardetosaurus viator 150.4–149.2 Mya · United States Tornieria 150 Mya · Tanzania Leinkupal 136.4 Mya · South America Ultrasaurus 110–100 Mya · United States Titanosaurus 70–66 Mya · India