@lance-comfort I think it’s going to be tricky to identify much further with the bone being sheared and worn. From what I’ve seen in the photos I’m still sticking with an artiodactyl proximal phalanx, but I’m my no mean convinced. It might help to go to our collections website database (http://www.flmnh.ufl.edu/vertpaleo-search) check the “Only results with images” box at the top, enter “Mammalia” into the Class field, and “phalanx” into the nature of specimen field (while also changing equals to contains in the drop down). That should give you some more images to compare to. I took a quick glance, but it’s hard to compare the images of your fossil without having the bone in my hand. Hope that helps!