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I recently saw this sawfish rostral barb up for sale as that of an Onchosaurus, but it looks very similar to those sold as Onchopristis: so which is it? Thanks in advance for any guidance Othniel

Hello everyone! I'm going to start posting fossils individually, to gain more traction on the forum. I'll post a few fossils I am worried are fake or composite today, then repost any fossils I have yet to receive identification for with higher-quality images in about a week. Here is an Onchopristis I purchased from a museum. After inspection and contrast with other barbs other collectors own, I have come to the conclusion that the barb is likely composite. In the images below, I have highlighted what I believe to be the original fossil in red. Do other people on the forum support this conclusion? Also, why does it seem to have a blood groove? Thanks for the help, and hope you have a good day.

Hello everyone ! I have these two fossil vertebrae from the Kem Kem formation from Morocco (no exact location) and I can't identify them. Can someone help me please? They are very different from each other. The red vertebra n.1 has an oval shape and has mirrored holes on both sides, while above it has a larger some. I initially thought it was Hybodus or Onchopristis, but I'm not sure, it could be many other shark species. The white vertebra n.2 does not have any type of hole on the edge and is almost perfectly round, I believe it is a completely different species from the first. Thank you.

Hello all Yesterday, I could add a few more items to my ever expanding Kem Kem collection. I am very excited with these pieces, but some of them I have a lot of questions by. 1) This weird lungfish toothplate. Currently there are 3 species of lungfish known from the Kem Kem beds. The first and most common species is Neoceratodus africanus, of which the toothplates are described as 'Toothplates with deeply incised ridges'. The second species is Ceratodus humei, described as 'small toothplates with low ornamentation and only four low ridges' Third species is Arganodus tiguidensis, described as 'small toothplates with a characteristic radiating pattern of ridges' I have the first two species, and have only rarely seen Arganodus popping up in the Kem Kem beds. But now I got this tooth: This tooth doesn't match any of the descriptions of the three regular species of lungfish. The only match I could find was Lupaceratodus useviaensis, a extinct lungfish species from the Cretaceous Galula formation in Tanzania. My tooth is a lot bigger however, standing at 4.5 cm and having 8 ridges instead of the 6 of the Tanzanian specimen. So what could this one be? I'm thinking it's most likely a new species or a species new to the location. I would be happy to hear the opinions of the people on here. 2: Double barbed Onchopristis barbs A while ago I made a topic regarding one of these barbs. The general consensus then was that it was a rare pathology, but now I have multiple specimens with double barbs all found at the same location. They are all in better quality then my first specimen and with the exception of some small repairs, no work has been done on them. Would you all still think this is a pathology? How large is the chance that multiple of these would be found in the same spot? All of these are in the normal size range of Onchopristis barbs. Link to previous topic: 3) This is probably a piece of chunkosaurus. Not sure if it's still in any way recognizable. It was sold as Coelacanth skull bone, but I'm more interested in the weird patterns on the bone. I've been searching a long time for traces of invertebrates from the Kem Kem beds (they don't really fossilize unfortunatly) and I think this time I might have found some. Could these tracks (marked in red) be tunnels of some kind of burrowing creature? If anyone recognizes the weird texture on this piece of bone that would be really helpfull. Thanks in advance Edit: Sources of quotes and image: ‘Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco’. Geraadpleegd 6 juni 2022. https://zookeys.pensoft.net/article/47517/. Gottfried, Michael, Nancy Stevens, Eric Roberts, Patrick O’Connor, en Remigius Chami. ‘A new Cretaceous lungfish (Dipnoi: Ceratodontidae) from the Rukwa Rift Basin, Tanzania’. African Natural History 5 (1 december 2009): 31–36.

I just recieved a box with a random assortment of Kem Kem fossils and I was wondering if some of you might help out with some of the ID's 1) A fish scute, Adrianaichthys (Lepidotes) pankowskii would be my guess. 2) Another Adrianaichthys (Lepidotes) pankowskii scale? 3) A small bone, turtle perhaps? 4) Crocodile osteoderm 5) Crocodile osteoderm 6) I often see similar fossil sold as Kem Kem coprolites 7) base of an Onchopristis numides rostrum tooth 8) A large fish vert, could it be Chondrichthyan like Onchopristis or probably just bony fish? 9) A fish vert? 10) Spinosaurid tooth

I have been trying to look for an onchopristus numidus tooth to complete a collection of mine and I am unsure if these are genuine as it is from a website I am unsure about.

Hey! I didn't know if anyone knows the best places to collect or look for Onchopristis rostrum fossils and Sclerorhynchidae fossils. I work at a National Park that protects pretty much the last remaining population of smalltooth sawfish and was looking to try to get my hands on a fossil specimen of each or see if people wanted to potentially donate a specimen of each to the park to help tell the story of this incredible critically endangered animal. If you or anyone you know is willing to help in sending me in the right direction on excivating, searching, purchasing, or donating please give me any pointers! Thanks to everyone on here for the help!

I am new to this forum, and I was pleasantly surprised with the friendly and immediate, helpful, educated responses I received when I asked for help ID-ing dromaeosur teeth! Thank you Troodon and Runner64 for your help! This seems like an active, educated forum where lovers of prehistoric life can gather to discuss fossils, and the like. So, I would like to show off my fossil collection, and discuss things about the small amount of material I have in my personal collection! Feel free to show me your collections as well, I would love to see them! So without further ado, on to my fossils!