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Ziapelta
''Ziapelta sanjuanensis'' is an extinct species of ankylosaurid from Upper Cretaceous (Campanian) formations in New Mexico. ==Discovery==
An expedition from the New Mexico Museum of Natural History and Science and the State Museum of Pennsylvania, led by Robert Michael Sullivan, discovered a number of ''Z. sanjuanensis'' fossils in the Kirtland Formation in 2011. The specimens were found in the Hunter Wash and De-na-zin Members of the formation in the Bisti/De-Na-Zin Wilderness in New Mexico. ''Z. sanjuanensis'' was identified as a new species from a number of fossils including the holotype NMMNH P-64484 found from the De-na-zin Member and consisting of a complete skull lacking the lower jaws, parts of the first two cervical half-rings, and a number of partial osteoderms; and a referred specimen NMMNH P-66930 from the older Hunter Wash Member, consisting of a first cervical half-ring. By argon dating of ash layers the age of the holotype skull has been determined at between 72.98 and 72.62 million years old, the late Campanian. It was initially prepared by Amanda K. Cantrell and Thomas L. Suazo; later by Larry Rinehart.〔
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