Outline Restoration by Charles R. Knight [7]
__________________________
[1] Scott, William, A History of Land Mammals in the Western Hemisphere, (New York: The MacMillian Co., 1913), 272
[2] Bennet, Deb, The Evolution of the Horse: History and Techniques of Study, 2008, 14
[3] https://en.wikipedia.org/wiki/Orohippus
[4] Woodward, Henry, A Guide to the Fossil Mammals and Birds in the Department of Geology and Palaeontology in the British Museum (Natural History), (London: Harrison and Sons, 1896), 38
[5] Ibid
[6] National Museum of Natural History, Smithsonian Institution, Washington, DC, USA.
[7] Osborn, Henry, The Age of Mammals in Europe, Asia and North America, (New York: The MacMillian Co., 1921), 162
[8] Granger, Walter, Article XV - A Revision of the American Eocene Horses, (American Museum of Natural History,1908), Vol. XXIV, Plate XVII
[9] Marsh, O.C., Fossil Horses in America,The American Naturalist, Vol. 8, No. 5, (The University of Chicago Press for The American Society of Naturalists, May 1874), 289. Retrieved from http://www.jstor.org/stable/2447952 (Gray added)
Skull and Jaw [8]
Orohippus osbornianus
A - Skull half, inferior view
B - Lower jaw half, occusal view
Fd. Bridger Formation, Wyoming, USA
12648 American Museum Collection
A
B
By Daderot [Public domain], from Wikimedia Commons
Skeleton [6]
Orohippus pumilus
Restoration by Charles R. Knight (1896)
via Wikimedia Commons
Foreleg [9]
Orohippus agilis
Orohippus
Copyright 2018 All rights reserved.
|
Size |
Small, no bigger than a fox [1] |
|
Eye sockets |
Incomplete bony rim, about 0.5 of skull length from front of skull to center of
socket |
|
Type of teeth |
Low crowned, enamel over dentine [2] |
|
Toes |
Four toes on each foreleg, three toes on each hindleg [3], all toes will
touch ground |
|
Hooves/pads |
Pad on each toe |
|
Locations found |
North America [4] |
|
Other |
“Prof. Cope states that the American Orohippus is identical
to Hyracotherium” [5]
Back arched upward
There appears to be fifteen sets of ribs in the photo below |
Orohippus