Unlike most ornithopods, which had long back legs and short arms, Koreanosaurus walked on all fours. It may have dug into the ground for food or for burrowing, like its American cousin Oryctodromeus (oh-RICK-toe-DROH-mee-us). Its arm and shoulder-blade bones were similar to those of present-day digging animals like anteaters. Koreanosaurus had sturdy front legs and a long neck, which held the head up high.
83 million years ago