Crazyhen Posted October 28, 2019 Share Posted October 28, 2019 This clutch is said to be found in Beipiu of Liaoning, China. It is said to be the primitive mammal of Triconodontidae. You can see the presence of individuals of different sizes. Any idea which species is that? Link to comment Share on other sites More sharing options...
doushantuo Posted October 28, 2019 Share Posted October 28, 2019 Closeup of the dentition* is of paramount importance/might help,along with a view of possible petrosals. *preferrably an occlusal view Link to comment Share on other sites More sharing options...
Carl Posted October 28, 2019 Share Posted October 28, 2019 They look at lot like lizards to me. Link to comment Share on other sites More sharing options...
jpc Posted October 28, 2019 Share Posted October 28, 2019 11 minutes ago, Carl said: They look at lot like lizards to me. I agree, but closer up photos would help us be able to ID them better. Link to comment Share on other sites More sharing options...
Carl Posted October 28, 2019 Share Posted October 28, 2019 4 hours ago, jpc said: I agree, but closer up photos would help us be able to ID them better. Agree agree Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted October 29, 2019 Share Posted October 29, 2019 The skulls look a lot too narrow for Triconodontidae. Looks a lot like Keichousarus to me. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
steelhead9 Posted October 30, 2019 Share Posted October 30, 2019 Haha. Compososaurus. Look like turtle skulls to me. Some of the early mammals had weird shaped skulls, and I would not completely rule out the possibility that this is something very rare, but I just see a lot of fake matrix on this specimen. Still Life Fossils Link to comment Share on other sites More sharing options...
ParkerPaleo Posted November 1, 2019 Share Posted November 1, 2019 I'm going to agree with some of the others and say lizard material, I'd even guess Iguanidae. I'm always a fan of comparison specimen so here is a skull of Aciprion from the Oligocene of Wyoming. We'd have to see the teeth on these to know for sure but shape is pretty close. Link to comment Share on other sites More sharing options...
jpc Posted November 1, 2019 Share Posted November 1, 2019 I like to think I am well versed in White River fossils, but I have never heard of Aciprion. Learn something new every day around here. Link to comment Share on other sites More sharing options...
ParkerPaleo Posted November 1, 2019 Share Posted November 1, 2019 37 minutes ago, jpc said: I like to think I am well versed in White River fossils, but I have never heard of Aciprion. Learn something new every day around here. I'm not sure if the name still holds, my literature references may be dated. Took it from Fossil Lizards of North America - Gilmore 1928. Described initially by Cope. The skull on the right side of the block really reminded me of it though. The teeth would be tricuspid if its an iguana. Link to comment Share on other sites More sharing options...
jpc Posted November 1, 2019 Share Posted November 1, 2019 12 hours ago, ParkerPaleo said: I'm not sure if the name still holds, my literature references may be dated. Took it from Fossil Lizards of North America - Gilmore 1928. Described initially by Cope. The skull on the right side of the block really reminded me of it though. The teeth would be tricuspid if its an iguana. I googled it and also found it in Gilmore 1928. But it is still listed on the paleobiology database and digimorph and the smithsonian's online database, so I guess it is still valid. Link to comment Share on other sites More sharing options...
Crazyhen Posted November 4, 2019 Author Share Posted November 4, 2019 The specimen has not been prepared well and so can’t really see the dentition but here are some photos of higher resolution. Link to comment Share on other sites More sharing options...
Crazyhen Posted November 4, 2019 Author Share Posted November 4, 2019 Link to comment Share on other sites More sharing options...
Crazyhen Posted November 4, 2019 Author Share Posted November 4, 2019 Link to comment Share on other sites More sharing options...
ParkerPaleo Posted November 4, 2019 Share Posted November 4, 2019 I still think it’s reptile. Skull morphology is all off for a mammal. https://images.app.goo.gl/kR8A9jD2VaKApWgy5 Link to comment Share on other sites More sharing options...
Carl Posted November 4, 2019 Share Posted November 4, 2019 Still seeing lizards Link to comment Share on other sites More sharing options...
jpc Posted November 4, 2019 Share Posted November 4, 2019 me too... lizards. The skull is much more lizard-like than mammalian and the vertebrae look lizardy. Link to comment Share on other sites More sharing options...
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