hxmendoza Posted February 4, 2015 Share Posted February 4, 2015 (edited) My Hell Creek Microraptorine sickle claw that I traded for a larger Hell Creek Dromaeosaur sickle claw. Probably Acheroraptor. The Microraptorine sickle claw after full restoration. It is related to Hesperonychus. I will miss it: Edited February 4, 2015 by hxmendoza 1 Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 My probable Acheroraptor temertyorum sickle claw. Tip restored but not yet painted. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 (edited) Bambiraptor sickle claw I used to own. This claw was a real beauty. From the Two Medicine Formation. Edited February 4, 2015 by hxmendoza Link to comment Share on other sites More sharing options...
Mediospirifer Posted February 4, 2015 Share Posted February 4, 2015 Very nice! Did you find any of these yourself, or were they all purchased? Nice restoration on the Acheroraptor, too. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 More views of the Hell Creek Formation probable Acheroraptor temertyorum sickle claw. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 (edited) Mediospirifer, thank you. They were purchased or traded for. Edited February 4, 2015 by hxmendoza Link to comment Share on other sites More sharing options...
jpc Posted February 4, 2015 Share Posted February 4, 2015 Inquiring minds want to know... What is acheroraptor? Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 (edited) Acheroraptor temertyorum is the very recently described Dromaeosaur out of the Hell Creek Formation. http://en.m.wikipedia.org/wiki/Acheroraptor Edited February 4, 2015 by hxmendoza Link to comment Share on other sites More sharing options...
jpc Posted February 4, 2015 Share Posted February 4, 2015 Thanks for that link. I was not aware of that paper. I guess I can call all my Lance and Hell Creek dromaeosaur teeth Acheroraptor. (and the one claw, too). Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 (edited) JPC can you post a pic of your claw? And yes, if your Hell Creek teeth have ridges on them and look like Saurornitholestine teeth they are Acheroraptor. Edited February 5, 2015 by hxmendoza Link to comment Share on other sites More sharing options...
Troodon Posted February 4, 2015 Share Posted February 4, 2015 Super Nice Claws Henry. Also let me add on the Acheroraptor that the one of the other diagnostic features is that the anterior serrations are much smaller than the posterior ones. Link to comment Share on other sites More sharing options...
jpc Posted February 4, 2015 Share Posted February 4, 2015 hx, or anyone else... do you guys have a pdf of this paper that you would be willing to share with me? Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 (edited) Troodon: Thank you! Also, the disparity in size between the anterior serration denticles and the posterior serration denticles is a diagnostic feature for all the Dromaeosauridae. The diagnostic feature of Acheroraptor teeth are the recurved teeth along with the two to three ridges on each side on the enamel. This is not to be confused with the teeth of Zapsalis. They have no anterior serrations, except for a keel. They do have Posterior serrations. But they are not very recurved and mostly have a straight posterior edge. They have many more prominant enamel ridges too. They can look like Paranychodon teeth superficially. But true Paranychodon lacustris teeth do not have any serrations at all. These are Zapsalis teeth: This is a true Paranychodon lacustris tooth: Edited February 4, 2015 by hxmendoza 2 Link to comment Share on other sites More sharing options...
sseth Posted February 4, 2015 Share Posted February 4, 2015 What a fantastic collection _____________________________________ Seth www.fossilshack.com www.americanfossil.com www.fishdig.com Link to comment Share on other sites More sharing options...
hxmendoza Posted February 4, 2015 Author Share Posted February 4, 2015 JPC: email me. I have a PDF somewhere. Just need to find it. Also, can I see a picture of your claw that you mention above? Link to comment Share on other sites More sharing options...
jpc Posted February 4, 2015 Share Posted February 4, 2015 JPC can you post a pic of your claw? I'll try to post it tonight. Link to comment Share on other sites More sharing options...
Troodon Posted February 4, 2015 Share Posted February 4, 2015 Well Paronychodon will soon be undergoing a significant change. I provided a Hell Creek jaw section to a leading theropod museum that contained both Paronychodon and Richardoestesia teeth in it. The jaw has been under study for over a year and even the experts are having difficulty placing it in the proper family. Stay tuned. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 5, 2015 Author Share Posted February 5, 2015 Troodon: I had heard a rumor about that. There's supposedly also a jaw out of the Hell Creek Formation of Powder River County in Montana that also shows variable tooth morphologies of these same taxon. Is this the same jaw or a different one? It'll be nice when the paper, or papers are published so there can be further refining of all these tooth taxons. Thanks for the heads up! Link to comment Share on other sites More sharing options...
hxmendoza Posted February 5, 2015 Author Share Posted February 5, 2015 What a fantastic collection Sseth: just in case, I wanted to clarify that the pictures of the Zapsalis, Paronychodon, and Acheroraptor teeth are not my specimens. I do own my own beautiful representative teeth of these taxon too. But I have not photographed them. In the interest of an expedited response I uploaded pictures I had in my database of nice representatives. I wasn't sure if you thought they were actually mine or not. Link to comment Share on other sites More sharing options...
Troodon Posted February 5, 2015 Share Posted February 5, 2015 Troodon: I had heard a rumor about that. There's supposedly also a jaw out of the Hell Creek Formation of Powder River County in Montana that also shows variable tooth morphologies of these same taxon. Is this the same jaw or a different one? It'll be nice when the paper, or papers are published so there can be further refining of all these tooth taxons. Thanks for the heads up! Same jaw .. Actually has three tooth morphologies on one jaw. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 5, 2015 Author Share Posted February 5, 2015 Same jaw .. Actually has three tooth morphologies on one jaw. Would that be the Paronychodon, Richardoestesia gilmorei, and the Richardoestesia isosceles morphotypes? Link to comment Share on other sites More sharing options...
Troodon Posted February 5, 2015 Share Posted February 5, 2015 Paronychodon, Richardoestesia isosceles and a unidentified tooth that appears fish like that is undescribed. Richardoestesia gilmorei is a valid species. 1 Link to comment Share on other sites More sharing options...
jpc Posted February 5, 2015 Share Posted February 5, 2015 Wow... this is a pretty exciting development in late K theropods. I can't wait. Link to comment Share on other sites More sharing options...
hxmendoza Posted February 5, 2015 Author Share Posted February 5, 2015 Paronychodon, Richardoestesia isosceles and a unidentified tooth that appears fish like that is undescribed. Richardoestesia gilmorei is a valid species. Thanks Frank, I'm glad to hear R. gilmorei is valid and not one of the involved Morphotypes. I suspected as such, so it's nice to know my reasoning was going in the right direction. Link to comment Share on other sites More sharing options...
Auspex Posted February 5, 2015 Share Posted February 5, 2015 The current iteration of a long, proud, and scary line: "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
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