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出典:Wikipedia
出典:『Wikipedia』 (2010/11/08 12:27 UTC 版)
Sifrhippus is an extinct, monotypic genus of equid containing the sole species Sifrhippus sandrae. Sifrhippus is the oldest equid known from North America, and its fossils come from the earliest Eocene of the Bighorn Basin, Wyoming.
sifrhippus