Heliscomyidae List of the Cenozoic life of North Dakota Geomyoidea List of the Cenozoic life of Nebraska List of the Cenozoic life of Montana List of the Cenozoic life of South Dakota 2009 in paleomammalogy List of the Cenozoic life of Wyoming Eoarctos List of the Cenozoic life of California List of the Cenozoic life of Colorado List of the Cenozoic life of Florida Sharps Formation 2019 in paleomammalogy