Dedicated to summarizing the facts regarding origins
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Hippidion
Pampean Horse Skeleton Drawing [2]
From Skeleton in the National Museum, Buenos Aires, Argentina
Restoration [3]
Hippidion neogaeum
From Skeleton in the National Museum, Buenos Aires, Argentina
_______________________
[1] https://en.wikipedia.org/wiki//Hippidon
[2] Simpson, George, Horses, (Garden City, New York: Doubleday & Company,1961), 197
[3] https://en.wikipedia.org/wiki//Hippidon
[4] Simpson, 197
[5] Licensed CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]
[6] Scott, William, A History Land Mammals in the Western Hemisphere, (New York: The MacMillian Co., 1913), 308 [7] Ibid., 214
Copyright 2018 All rights reserved.
Photo by Ghedoghedo, via Wikimedia Commons [6]
Skeleton
Hippidon sp.
Natural History Museum, London, England
Perissodactyla/Equidae/Equinae

 

Size

About 4.6 ft tall at shoulders [1]; size of a pony

Eye sockets

Far back in head, closed socket, "eye smaller than most horses and set unusually low in the head" [2] 

Type of teeth

High crowned 

Toes

One large toe per leg

Hooves/pads

Hooves

Locations found

California, USA; Central and South America [3]

Other

Very long nasal bone, skull usually slender compared to length and depth [4]

Anchippus
Anchitherium
Equus 1 (Recent)
Equus 2 (Recent)
Equus 1 (Fossils)
Equus 2 (Fossils)
Hipparion
Hippidion
Hypohippus
Kalobatippus
Merychippus
Mesohippus
Miohippus
Nannippus
Neohipparion
Orohippus
Parahippus
Pliohippus
Protohippus
Protorohippus
Unidentified
Hyracotherum (Eohippus)
Horse Evolution?