Protohippus is an extinct three-toed genus of horse.[3] It was roughly the size of a modern donkey. Fossil evidence suggests that it lived during the Late Miocene (Clarendonian to Hemphillian), from about 13.6 Ma to 5.3 Ma.[4]
Protohippus | |
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Protohippus simus skeleton | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Perissodactyla |
Family: | Equidae |
Subfamily: | Equinae |
Tribe: | Equini |
Genus: | †Protohippus Leidy, 1858[1][2] |
Type species | |
Equus (Protohippus) perditus Leidy, 1858
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Analysis of Protohippus' skull and teeth suggests that it is most closely related to the genus Calippus.[4]
Species include: