PHILADELPHIA -- Through the cycads and gingkoes of the floodplains, not far from the Sundance Sea, strode the 50-foot-long Suuwassea, a plant-eating dinosaur with a whip-like tail and an anomalous second hole in its skull destined to puzzle paleontologists in 150 million years. According to researchers at the University of Pennsylvania, Suuwassea emilieae (pronounced SOO-oo-WAH-see-uh eh-MEE-LEE-aye) is a smaller relative of Diplodocus and Apatosaurus and is the first named sauropod dinosaur from the Jurassic of southern Montana. Their findings currently appear in the journal Acta Paleontologica Polonica