Awhile back we had the great fortune to do a trade with our friend @Captcrunch227. Beau has been a friend since we joined and among the shark goodies he sent us was a bag of micro matrix from Eagle Ford, Post Oak Creek if memory serves.
I found 4 teeth that appeared to be Orectolobiformes. Cretaceous Texas seems to have been environment well suited to Carpet Sharks. Cantioscyllium, Plicatoscyllium, Nebrius, and Ginglymostoma are all listed on Elasmo though those examples are from the Kemp Clay. I found two distinct tooth types but I am not 100% sure my ID’s are accurate. I had the chance to get pictures of the tiny teeth so hopefully I can get some help with these.
I think the first two are Cantioscyllium teeth. They are larger than the other two. These are both around 4mm or so. I researched this quite a bit and that was the best fit but I could definitely be wrong.