By Leidy, Joseph, 1823-1891 . Genre n-us--- / Reptiles, Fossil / Paleontology / Cretaceous / Paleontology and 1 more . Names planes / xx / apex / reptiles / robust and 1849 more

By Ward, Lester Frank, 1841-1913 . Genre Paleobotany / Cretaceous . Names age / s a / sp / plants / nansenia sp and 13881 more

By Knowlton, Frank Hall, 1860-1926 . Genre Paleobotany / Cretaceous / Paleobotany / Denver Basin / Paleobotany and 1 more . Names montana / neomeris sp / nymphoides sp / type / age and 17199 more

By Leidy, Joseph, 1823-1891 . Genre Vertebrates, Fossil / Paleontology / Cretaceous / Paleontology / Tertiary and 2 more . Names animal / fossils / xx / intermediate / animals and 2731 more

By Stanton, T. W. (Timothy William), b. 1860 . Genre Invertebrates, Fossil / Paleontology / Cretaceous / Geology, Stratigraphic / Cretaceous . Names type / sp / fossils / mus / montana and 6767 more

By Stephenson, Lloyd William, b. 1876 . Genre n-us--- / Geology, Stratigraphic / Cretaceous / Geology / United States and 1 more . Names ala / fossils / basal / sp / mollusca and 12829 more