Premise: Brachiosaurus [ ˌbrækiəˈsɔːrəs ] is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America . Brontosaurus ( [ ˌbrɒntəˈsɔːrəs ] ) , meaning `` thunder lizard '' ( from Greek βροντή , brontē = thunder + σαῦρος , sauros = lizard ) , is a genus of gigantic quadruped sauropod dinosaurs . The Land Before Time . The plot concerns a young Brontosaurus named Littlefoot who is orphaned when his mother is killed by a Tyrannosaurus .
Hypothesis: The Land Before Time is unrelated to any sauropods.
Label: CONTRADICTION