Triassic Fossils of West Texas

I found my first Triassic fossil when I was about 15 years old on a backpacking trip in Tule Canyon, Briscoe County in Texas. After setting up camp, I walked over to a small, red-coloured hill. On its slope, I found a small, unusual bone fragment approximately 5cm by 5cm by 1cm and I remember being really excited. It was the first petrified bone I had ever found and it seemed strange to me. The bone fragment was flat on one side and had dimples and pits on the other side. It just didn’t look like anything I had ever seen before.

1sideruleMy first phytosaur skull. All the teeth and part of the rostrum is restored. Leptosuchus?

I carried this unusual bone fragment in the glove compartment of my car for years, hoping to find someone who could identify it. However, I was never able to find anyone who knew anything about the fossil. Eventually, I became interested in geology and learned for myself the geology and paleontology of the region where I live. This eventually led to my becoming a science teacher. In time, I was able to identify my strange little fossil bone as being a scute fragment from the back armour of a Thecodont Reptile called an Ateosaur. (A “scute” is thickened, horny or bony plate that can be seen today on the shells of turtles or on the backs of crocodiles.) For those unfamiliar with Ateosaurs, these were the heavily armored reptiles of the Triassic Period that are, in many ways, similar to the dinosaurian Nodosaurs and Ankylosaurs of the Cretaceous Period.

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