For those not from around here, the Paluxy is the river than flows through Glen Rose.
This shot was in Dinosaur Valley State Park, so named for the dinosaur tracks located in the rock shelves of the river bed.
A long series of tracks was removed a few decades ago and now sits in the American Museum of Natural History. There are plenty left.

The animal is an Armadillo, named by early Spanish explorers.
Though it look reptilian, it is a mammal. This one is a juvenile, about half the size of an adult.