White River Calcaneum Help

[Peat Burns]

Hello!

 

I was wondering if anyone might recognize this calcaneum from the White River Group of Nebraska.  It is much larger than an oreodont.  I have placed it next to oreodont calcanea for comparison.

 

an articulated portion of the left foot of an oreodont is on top, middle is a single oreodont calcaneum, bottom is the unidentified calcaneum. (more pics to follow)

 

 

 

 

An articulated portion of the left foot of an oreodont is on top, middle is a single oreodont calcaneum (right foot), bottom is the unidentified calcaneum (right foot). (more pics to follow)

 

[Peat Burns]

Dorsal side of right calcaneum.  Unknown above, oreodont below.

Ventral side of right calcaneum.  Unknown above, oreodont below.

Articular view of right calcanea.  Unknown left (partially missing), oreodont right

 

[jpc]

your posts make me wish I knew my individual White River bones better.  And I should but that is another discussion.  

[Harry Pristis]

 

 

I would compare it to a rhino calcaneum, Hyracodon or Diceratherium.  I don't have a useful image at the moment, but I'll try to make one later.

 

 

[Harry Pristis]

 

 

Well, here are some images of one smaller rhino.  After handling several of these in making the images, your #4578 doesn't make a good match.  What do you think?  I'll look in my drawer for a better match.

 

 

[Nimravis]

I am also thinking Rhino- here are a couple of mine. The two on the left I believe are Rhino- the far left on is a good size and not even complete.

 

[Harry Pristis]

 

It doesn't appear to be a bear dog (amphicyonid) or a prosynthetoceratine.

 

 

 

 

[Peat Burns]

Thank you @Harry Pristis and @Nimravis

This info will give me something to pursue.  I think I'll start with comparing with Hyracodon based on frequency/probability and go from there if necessary.

 

@jpc you won't get any chastisement from me . This is my first sojourn into oligocene vertebrates, and moreover, I am still learning / honing my tetrapod skeletal anatomy in general...