Brontosaurus was a species of Dinosaur, living in prehistoric times.
Superman once fought and killed a Brontosaurus, stabbing it in the neck, for unknown reasons. The defenseless dinosaur offered little resistance. ("Action Movie")
Supergirl, time-traveling from the future, briefly fought and tamed a Brontosaurus, which she named Bronty. She then proceeded to ride him through the world of cave man times. ("The Cave-Girl of Steel")