Arachnologist Hank Guarisco identified this as Bagheera from a living specimen. Texas A&M lists Bagheera prosper as the only member of this genus found in Texas. We found two at Lake Tawakoni State Park. They are likely common there because we spent little time spidering.

The only other member of this genus is Bagheera kiplingi, recently determined to be a primarily vegetarian spider eating the Beltian bodies of Acacia trees. There were Acacia-like trees at the park, and park staff is getting back to me on the exact species of the tree.

I had trouble getting a good photo because the spider was fast and would not stop moving.