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I have been trying to finish up my ID's of small teeth I collected last year from Moss Creek in Texas (near the North Sulphur River). This material is Upper Cretaceous, Campanian and I have found at least a dozen genera of sharks with Cretalamna, Scapanorhynchus, Pseudocorax and Squalicorax being the most common forms. I'm going to start with seven teeth that I think may be the same but I can not put a name to. I have been through the references I have specific to this formation or age, elasmo.com, and many very helpful posts on here, but I am still at a loss. In Welton and Farish, they look most like Microcorax crassus, but those are supposed to be somewhat older, and even then there are still some differences. They may be posteriors of one of the more common forms, but I have not found a good match yet, so I'd appreciate some help. I'll tag a few a the folks I know are usually pretty good with this stuff: @Al Dente, @MarcoSr, @ThePhysicist, @fossilsonwheels and a couple I know have collected here recently: @EPIKLULSXDDDDD, @Ironhead42 I do not see any serrations or nutrient grooves on any of them. My pictures from above did not come out very well, so I'll just post a couple (with matching numbers from above) that I think show the patter most of them have (flat on the one side and quite convex on the other with a more expanded root). Thanks for any advice you can offer. Mike

So a couple of weeks ago, I, along with my younger brother, decided to embark on our first field trip with the Dallas Paleontological Society. The destination was Moss Creek, a decently sized waterway on private property that feeds into the NSR. Just like in the main river, we were seeking a red layer exposure of the Ozan Fm (though I read that this red layer is different from the one at the river). This site is famous for its abundance of marine microfossils, namely shark/fish teeth. One of the people on the trip was a researcher (Shawn Hamm) who is currently finishing up a paper on this very site. I hope to read it once it's published! Anyways, the day was miserably hot as expected, but the scenery and air of discovery made up for it. My brother and I took a more secluded route, traveling downstream whereas most headed upstream. After a bit of searching, I came across a part of the creek bed that was red and, upon close inspection, was filled with tiny black phosphatic fossils. Because the matrix of the layer is so sticky, we couldn't really sift through it at the site. Instead, we, like everyone else, filled up a bucket and took it back to our car. It was a fun day and I met a lot of interesting people. One member told me to use baking soda to break up the matrix and that advice worked like a charm! I'm not sure about a lot of these IDs so feel free to correct me. If you know any species names feel free to drop those too . Here are the pictures of the highlight finds. Sorry the quality is bad... taking pictures of things this small was more difficult than expected: Fishes Lots of Enchodus Fangs and Jaw Sections Lots of Hadrodus Teeth Pachyrhizodus? Teeth Protosphyraena? Teeth. Really not 100% on this ID Pycnodont Teeth Fish Neural Spine. 2nd photo is compared to an X-Fish neural spine I found in Austin. Love the size discrepancy of the two. Fish Verts (Left) and Shark Vert (Right) Sharks Hybodont Shark Tooth. This is one of my favorites. Looks like Lonchidion? but that's just my guess. Lots of Pseudocorax Teeth Lots of un-ID Shark Teeth. Distinguishing between Scapanorhynchus, Carcharias, etc. is way above my pay grade . Trust me, I tried... Cretalamna appendiculata Tooth. By far the biggest tooth. Protolamna? Teeth Squalicorax Teeth. For some reason they all came out broken. Unidentified Tooth. Pathological? The crown is just a flat edge. Shark Coprolite? It's ringed like the ones I've seen online. Sawfish Ischyrhiza Oral Teeth Ischyrhiza? Rostral Teeth Ptychotrygon? Oral Teeth Cantioscyllium? Oral Teeth Misc./Enigmatic Finds Brittle Star Parts? Part of an Urchin? It's rounded and the center has a protrusion for where a spine once was. Kinda looks like a denticle, but may be some weird tooth? Bivalves If you would like any additional pics, let me know. Thanks for reading!

Went on a trip with Dallas Paleo Society to a Moss Creek site on private land. just ran a small batch of the matrix that I brought back. These are the "bigs", size reference is about 4 pieces per inch. Just finished this batch yesterday and haven't had a chance to do any id work yet. Variety of shark teeth Fish teeth Vertebra Cool and unique teeth Completely unknown More cool and unique (at least to me) Any help is appreciated as always! Hope you enjoy!