ecofactbook
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species
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Animalia
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Chordata
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Mammalia
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Perissodactyla
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Equidae
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Protohippus
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Protohippus ansae
Protohippus avus
Protohippus coalingensis
Protohippus fossulatus
Protohippus gidleyi
Protohippus pachyops
Protohippus placidus
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