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had a slimmer body, a more elongated head, slimmer forelimbs and longer hind legs, all of which are characteristics of a good jumper. Its teeth were
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Kitts, D. B. 1957. A Revision of the Genus
Orohippus (Perissodactyla, Equidae). American Museum Novelties, 1864:1–40.
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391:. The anatomical differences between the two are slight: they were the same size, but
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in height, but the development of flattened surfaces and shearing
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appears about 2 million years after the first appearance of
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on their molars suggests they were more a browser than a
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49:. Unsourced material may be challenged and removed.
526:MacFadden, B.J., 1998. Equidae. pp. 537–559
536:Evolution of Tertiary Mammals of North America
497:"Glossary. American Museum of Natural History"
153:at the Smithsonian Museum of Natural History.
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542:Orohippus, Index Fossils and the Tertiary
530:C.M. Janis, K.M. Scott, and L.L. Jacobs (
109:Learn how and when to remove this message
470:
538:Cambridge University Press, Cambridge.
552:National Center for Science Education
7:
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47:adding citations to reliable sources
1254:. You can help Knowledge (XXG) by
1201:. You can help Knowledge (XXG) by
14:
1250:This equine-related article is a
1346:Prehistoric Perissodactyla stubs
1326:Extinct mammals of North America
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131:Temporal range: early to middle
23:
1311:Eocene mammals of North America
383:, as the earliest evidence for
34:needs additional citations for
1331:Eocene genus first appearances
356:(about 50 million years ago).
1:
1341:Fossil taxa described in 1872
1321:Prehistoric placental genera
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547:The Evolution of the Horse
422:has also been referred to
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411:are no longer present in
348:, 'horse') is an extinct
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159:Scientific classification
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1336:Eocene genus extinctions
16:Extinct genus of mammals
1316:Paleogene United States
594:, arranged by subfamily
373:It is believed to have
1197:-related article is a
486:MacFadden, 1998, p.543
477:MacFadden, 1998, p.554
454:Evolution of the horse
370:
1306:Eocene Perissodactyla
1157:Paleobiology Database
362:
503:on 20 November 2021.
407:. The outer toes of
377:from equids such as
43:improve this article
446:Paleontology portal
587:Extinct genera of
371:
352:that lived in the
263:Orohippus pumillus
151:Orohippus pumillus
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1195:odd-toed ungulate
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1144:Open Tree of Life
1071:Taxon identifiers
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923:Proboscidipparion
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337:, 'mountain' and
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971:Heteropliohippus
888:Eurygnathohippus
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708:Propalaeotherium
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964:Haringtonhippus
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60: –
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54:Find sources:
48:
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38:
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32:This article
30:
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21:
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1256:expanding it
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1203:expanding it
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988:Protohippina
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937:Shanxihippus
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916:Neohipparion
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902:Hippotherium
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865:Hipparionini
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847:Acritohippus
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784:Kalobatippus
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756:Anchitherium
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736:Xenicohippus
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694:Heptaconodon
692:
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673:Ghazijhippus
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509:
501:the original
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255:Type species
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150:
149:Skeleton of
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65:
53:
41:Please help
36:verification
33:
1351:Horse stubs
1192:prehistoric
1103:Wikispecies
1017:Astrohippus
1001:Protohippus
944:Sivalhippus
854:Merychippus
770:Desmatippus
687:Haplohippus
644:Basal forms
627:Superorder
621:Infraclass
418:Species of
303:O. pumillus
297:O. proteros
58:"Orohippus"
1295:Categories
1045:Pliohippus
1024:Dinohippus
819:Sinohippus
812:Parahippus
798:Mesohippus
791:Megahippus
777:Hypohippus
729:Sifrhippus
701:Pliolophus
680:Eurohippus
521:References
397:brachydont
323:(from the
69:newspapers
1109:Orohippus
1079:Orohippus
1038:Hippidion
1009:Subtribe
986:Subtribe
909:Nannippus
895:Hipparion
805:Miohippus
722:Orohippus
666:Erihippus
659:Epihippus
420:Orohippus
413:Orohippus
405:frugivore
393:Orohippus
385:Orohippus
320:Orohippus
279:O. agilis
240:Orohippus
182:Kingdom:
176:Eukaryota
127:Orohippus
99:July 2007
1088:Wikidata
994:Calippus
652:Eohippus
623:Eutheria
617:Mammalia
611:Chordata
605:Animalia
603:Kingdom
432:See also
409:Eohippus
389:Eohippus
380:Eohippus
285:O. major
270:Species
222:Family:
206:Mammalia
196:Chordata
192:Phylum:
186:Animalia
172:Domain:
1149:3614908
1136:1210036
1123:4830461
1094:Q679501
830:Equinae
609:Phylum
589:Equidae
375:evolved
232:Genus:
226:Equidae
212:Order:
202:Class:
83:scholar
1011:Equina
955:Equini
633:Order
615:Class
354:Eocene
345:híppos
248:, 1872
133:Eocene
85:
78:
71:
64:
56:
1190:This
1162:43015
1131:IRMNG
1031:Equus
465:Notes
459:Horse
401:lophs
350:equid
340:ἵππος
325:Greek
246:Marsh
90:JSTOR
76:books
1252:stub
1199:stub
1118:GBIF
532:eds.
368:AMNH
334:óros
329:ὄρος
62:news
45:by
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112:)
106:(
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97:(
87:·
80:·
73:·
66:·
39:.
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