In the middle Eocene formations of North America occurred the more specialized " Uintatherium " ( or " Dinoceras " ), typifying the family Uintatheriidae.
2.
U . S . paleontologists Henry Fairfield Osborn and Roy C . Andrews discovered two premolars on the site in 1923, and assigned the specimen to the new genus " Eudinoceras " because he believed it to be related to " " Dinoceras " " ( now known as " Uintatherium " ).
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