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Recently I went on a fossil hunting trip with a few friends to a roadcut in Oglesby Illinois from the Pennsylvanian Bond Formation. This was around July and I found a lot of cool Brachiopod fossils, but I decided a few days ago I wanted to get a closer look at some of the larger matrixes I collected to see if I missed something! At the very edge of one the matrixes, I discovered a small pretty exposed cladodont tooth that I couldn't find a specific ID of? The specimen is about 1/2 inch in length (5.0 mm.). But I wanted to see it a bit closer, so I put it under a microscope one of my college professors let me borrow. The specimen has a pretty slender shape overall and the top of the medial cusp appears to be broken off. I compared the specimen to other ctenacanthiformes from the Bond like Heslerodus and Gilkmanius. It does resemble Gilkmanius a bit, but I looked further and have drawn a slightly different conclusion - this could be a specimen of a juvenile Saviodus striatus. https://www.uky.edu/KGS/fossils/fossil-of-the-month_2022-07_Saivodus.php Like Saivodus, the Medial cusp is incredible slender for what's left of it. The Laterial cusps and cusplets on Saivodus teeth are much smaller compared to the Medial cusp than those of Heslerodus and Gilkmanius. On the microscope image, you can just barley make out a small cusplet next to the Medial cusp and a small Lateral cusp on the left side of the image (since under a microscope, it's actually on the right side of the tooth). Still, I'm not 100% sure my ID is correct. I was wondering if anyone is able properly ID this specimen? I'm also wondering if this cladodont tooth is indeed a specimen of Saivodus striatus or another member of the genus (which I would be awesome) or a a member of different Ctenacanthiform genus (which also would be awesome)?

Location: Missouri Period: Pennsylvanian Formation: Iola Limestone (Muncie Creek Shale Member) Hello once again! Today I have a fossil tooth that I happened to have seen while going through my old phosphatic nodules from Muncie Creek and was wondering if anyone could identify it further than a Cladodont tooth. I have googled images of Cladodont teeth and believe it to possible be a tooth belonging to Falcatidae, but what do you think? It resembles a few of these teeth on the chart below in size and form, hence why i'm making the guess of it being a Falcatid even though my tooth has very slight differences in lengths of each cusplet. I will note that my specimen seems to have 6 cusps total, while the specimens below that it most resembles has 5. Here is the size in mm. The last thing I wanted to note is that it might be next to possible coprolitic material, although it's hard to tell as coprolites in these nodules looks very similar to just a phosphate center, although if you find inclusions its almost guaranteed. Example of an obvious coprolite and a not so obvious coprolite from these nodules.

This odd shaped fossil is attached to a chert nodule found in between the Pennsylvanian Muncie Creek Shale on the bottom and the Raytown Limestone above. The nodule itself was in this sort of mudstone, sandy/gravelly clay mix, right up next to and underneath the Raytown Limestone. I find a lot of conularid in this same layer and this same general area. The matrix the fossil is in is actually Raytown Limestone that is fused to the nodule. The fossil itself is 'chalkier' than the surrounding matrix and looks to be about a quarter inch deep into the matrix. Sorry for no scale but the nodule is about 4 inches long and the fossil is about 1-1/4" inch 'tall', 1-1/2" inch wide. The tip of the one end has what looks like some longitudinal striation similar to some horn corals I have found higher up in the Raytown but this really doesn't scream out 'horn coral'. Anyways, here are some pictures and maybe you all can throw some ideas my way! Thanks for looking! pic1 pic2