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ElToro

What kind of jaw is this? Three toed horse?

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ElToro

This jaw section is from the Nebraska Badlands. Found near a Hyaenodon jaw. I'm no expert. Anyone know what this is from? My first tentative guess is three toed horse...Any experts?

post-20038-0-83650200-1449999468_thumb.jpg

post-20038-0-30673600-1449999490_thumb.jpg

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fossilized6s

It's most likely an Oreodont.

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ElToro

Thanx. I thought oreodont or horse...

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abyssunder

For me looks more like Mesohippus.

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fossilized6s

Yes, I think you were right on your initial guess. My bad.

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jpc

Utah...? Are you sure? It looks like a White River fossil, which there is none in Utah. Looks more like an oreodont.

Edited by jpc

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Harry Pristis

Oreodonts don't have the prominent cingulum on their lower teeth. Mesohippus does. Agree, this jaw is most likely from the Nebraska/South Dakota/et al. badlands.

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jpc

Oreodonts don't have the prominent cingulum on their lower teeth. Mesohippus does. Agree, this jaw is most likely from the Nebraska/South Dakota/et al. badlands.

I'll go with that...

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ElToro

Oreodonts don't have the prominent cingulum on their lower teeth. Mesohippus does. Agree, this jaw is most likely from the Nebraska/South Dakota/et al. badlands.

Yup, you are absolutely right. Its from Nebraska. I just checked and I had gotten mixed up. Thanx!

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JohnJ

Topic edited from "Utah" to "Nebraska".

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jpevahouse

There are several features of the jaw section and teeth which suggest mesohippus. When teeth are that worn a definite ID can be difficult. Mesohippus is a common fossil in that part of the country.

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ElToro

There are several features of the jaw section and teeth which suggest mesohippus. When teeth are that worn a definite ID can be difficult. Mesohippus is a common fossil in that part of the country.

Thanx mate. Yea, they seem pretty common! My mate in the US goes for an afternoon walk and comes home with a bag full. He also found my two lovely associated Hyaenodon mandibles. The teeth on those are positively frightening!

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