Assertion: dinosaur's skeleton | /r/HasProperty | holotype
Facets:
Source sentences:
text: The first Apatosaurus bones were discovered by Edward Drinker Cope and the name Apatosaurus ajax was coined in 1877 by Cope’s rival Othniel Charles Marsh, Professor of Paleontology at Yale University, based on a nearly complete skeleton (holotype, YPM 1860) discovered in the eastern foothills of the Rocky Mountains in Gunnison County, Colorado.