Latin name: unknown
I think this may be a Lynx spider (family Oxyopidae). We went for a looong walk down a limestone creek bed Saturday, all the way to a waterfall where we were able to join up with a trail and get back to the car. This spider was foraging around among the rubble of the creek bed. The fact that he's posing beside a fossil is rather a happy coincidence.
It was not easy to manually focus the camera on this spider. I think that something about the striping, the mix of light and dark hairs, and the patterning of the hairs themselves makes it difficult to judge depth accurately.