Texas phalanx bone 2

[johnnyvaldez7.jv]

I found this other very eroded phanlanx....which would this also be a proximal phalanx? The end has a cross shape I thought was unusual and not like the other one in the  previous post. And could this be horse or cow?

[Meganeura]

This one is ALSO cow - and also juvenille, I think - which is why it's got the cross shape - not fully formed. I may be wrong, though I'm quite sure they're both cow.

[Harry Pristis]

Yes, Meganeura has it right -- it's a proximal phalanx from a sub-adult bovid.  The "cross" is the end of the bone shaft which is missing its epiphysis.  In an adult, the epiphysis would be fused to the shaft.  Here's what it looks like in a young horse:

 

[johnnyvaldez7.jv]

That's very interesting. I would have never known that about the differences in a young horse and an adult and the fusion that takes place. Very informative.