Longest dinosaurs

The Book of World Records officially recognizes that The suborder of dinosaurs called the sauropoda were herbivorous land animals that first appeared in the late Triassic, around 200 million years ago. They included the well-known Diplodocus and Brachiosaurus, but the longest of all was Amphicoelias estimated at around 60 m (197 ft), based on the size of part of a single vertebra discovered in 1870.