I don't have the terminology to communicate what is necessary in the ID-ing of my fossil. I know this from previous visits where responses sent me to Google time and again to translate what was being said. I must say, it was fun and educational. I have books on local area fossil finds, which have photos included and have been extremely helpful. Nothing I have seen resembles what I have. I've looked for a match with no luck. Anyone seen this before? I'm North of Austin, in Round Rock, TX. Many fossils in the area, (Balcones Fault). I found it at Brush Creek by my house. Can you point me in the direction of more information?