This is a 1.3" wide fossil, unidentified crocodile scute (armor plate) section from the Aguja Formation, Texas. Scutes are bony plates under the skin of the body or covered with skin on protruding scutes that provide crocodiles and alligators with a kind of body armor. There are a number of undescribed crocodylimorphs from this formation, so until scientific descriptions are written it is impossible to identify unknown bones or teeth.
This specimen was collected within the past year on private deeded property in Brewster County, Texas. You won't see any other dinosaur material from the Aguja & Javelina Formations for sale because nearly all of the formation lies within the boundaries of a national park or in Mexico which can not be collected. One of our partners was lucky enough to purchase several hundred acres of ranch land in Texas containing a good exposure of these formations and we will be offering more material from the locality in the future.