would become Hypsiloichnus marylandicus. Photograph of a Hypsiloichnus marylandicus footprint, from The Paleontology Portal. Zephyrosaurus in The Natural History Museum's Dino Directory. Early Cretaceous dinosaurs of North America Fossil taxa described in 1980 Taxa named by Hans-Dieter Sues Cloverly fauna Paleontology in Montana Ornithischian genera