بواسطة Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. و 5 اكثر . النوع n-usp-- / Paleontology / Western states / Paleobotany / Western states و 2 اكثر . الأسماء: type / fossils / stoliczka / fox / umbilicus و 13618 اكثر