Ptychodus anonymous, DFW
This week I made my first venture into the Kamp Ranch of DFW. It was a great spot with loads of Ptychodus. Most of them were only fragments, but I got a handful of keepers. This specimen was the find of the day. I thought it was P. marginalis at first, but @LSCHNELLE suggested P. anonymous was an option and I took a second look. It's a bit higher crowned than most P. marginalis and the marginal area is indistinguishable from the other P. anonymous of the day. I had read that the Turonian morphotype of this species was larger than the Cenomanian and could often reach 20 mm, but this is the first time I've directly observed this increased size.