Heterosalenia sp. (genus ascertained by JohnJ)
Bottom of Unit 2, Lower Member, Glen Rose Formation, Trinity Group
Albian (Lower Cretaceous)
These odd little Salenids were first noticed by JohnJ many years ago. I was lucky enough to find another slightly larger specimen. This one was hiding in my collection amongst some more common species. These are now being studied and properly described by an actual paleontologist!