Self-taught Posted April 14, 2021 Share Posted April 14, 2021 Hello everyone, I am trying to identify a dinosaur vertebra that comes from the KemKem basins in Morocco. Can you help me ? Link to comment Share on other sites More sharing options...
fifbrindacier Posted April 14, 2021 Share Posted April 14, 2021 @Troodon? "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Troodon Posted April 14, 2021 Share Posted April 14, 2021 A cervical but anything would be a guess @MBL13 can shed some light on it Link to comment Share on other sites More sharing options...
MBL13 Posted April 14, 2021 Share Posted April 14, 2021 8 hours ago, Self-taught said: Hello everyone, I am trying to identify a dinosaur vertebra that comes from the KemKem basins in Morocco. Can you help me ? The vertebra belongs to a spinosaurid. There's a bit of uncertainty over the spinosaurid diversity on Kem Kem,however,I'll follow Smyth et al. and referr the vertebra to Spinosaurus aegyptiacus. Others might use Sigilmassasaurus brevicollis. I had my time to look at some details,I'm not sure that the vertebra can be positioned confidently. The morphology suggest either a posterior cervical or a cervicodorsal vertebra. A C8 is unlikely as it lacks a ventral rugose platform (VrP). I would discard a D2 and D3 as well. I cannot identify properly the position because it's heavily distorted. The following images are taken from McFeeters et al.(2013) First,the posterior cervical(~C9) CMN 41856: Here's CMN 41857(D1), holotype of "Sigilmassasaurus brevicollis": References: 1) Smyth, Robert & Ibrahim, Nizar & Martill, David. (2020). Sigilmassasaurus is Spinosaurus: A reappraisal of African spinosaurines. Cretaceous Research. 114. 104520. 10.1016/j.cretres.2020.104520. 2) McFeeters, Bradley & Ryan, Michael & Hinic-Frlog, Sanja & Schroder-Adams, Claudia. (2013). A reevaluation of Sigilmassasaurus brevicollis (Dinosauria) from the Cretaceous of Morocco. Canadian Journal of Earth Sciences. 50. 636-649. 10.1139/cjes-2012-0129. 7 Link to comment Share on other sites More sharing options...
Self-taught Posted April 14, 2021 Author Share Posted April 14, 2021 Thank you very much for helping me, I was thinking more of an Abelisauridae never I would have believed in a Spinosauridae .. Thank you Link to comment Share on other sites More sharing options...
MBL13 Posted April 14, 2021 Share Posted April 14, 2021 (edited) I've yet to see a well preserved abelisaurid cervical vertebra from KK,but they have some key differences compared with those of spinosaurids. Here's a pair of figures with the posterior cervical vertebrae of Carnotaurus sastrei: C9: C10: Reference: Méndez, Ariel. (2012). The Cervical Vertebrae of the Late Cretaceous Abelisaurid Dinosaur Carnotaurus sastrei. Acta Palaeontologica Polonica. 59. 10.4202/app.2011.0129. Edited April 14, 2021 by MBL13 2 Link to comment Share on other sites More sharing options...
LordTrilobite Posted April 14, 2021 Share Posted April 14, 2021 Yup, posterior cervical of a spinosaurid. Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Self-taught Posted April 14, 2021 Author Share Posted April 14, 2021 MBL13 thank you so much Thank you for all this information Link to comment Share on other sites More sharing options...
MBL13 Posted April 14, 2021 Share Posted April 14, 2021 It's a pleasure. I have something in development,but cannot comment what it is,hope it will help people with this type of material. Link to comment Share on other sites More sharing options...
digit Posted April 14, 2021 Share Posted April 14, 2021 20 minutes ago, MBL13 said: I have something in development,but cannot comment what it is,hope it will help people with this type of material. Please announce here when you are free to do so. Cheers. -Ken Link to comment Share on other sites More sharing options...
MBL13 Posted April 14, 2021 Share Posted April 14, 2021 I will post a thing very soon... 1 Link to comment Share on other sites More sharing options...
MBL13 Posted April 14, 2021 Share Posted April 14, 2021 Here's the mystery project,to those interested: @digit Link to comment Share on other sites More sharing options...
MBL13 Posted April 15, 2021 Share Posted April 15, 2021 On 4/14/2021 at 11:35 PM, MBL13 said: I've yet to see a well preserved abelisaurid cervical vertebra from KK,but they have some key differences compared with those of spinosaurids. Here's a pair of figures with the posterior cervical vertebrae of Carnotaurus sastrei: C9: C10: Reference: Méndez, Ariel. (2012). The Cervical Vertebrae of the Late Cretaceous Abelisaurid Dinosaur Carnotaurus sastrei. Acta Palaeontologica Polonica. 59. 10.4202/app.2011.0129. I spoke to soon,after looking at some recent papers,I've found this vertebra.An abelisaurid axis (C2) described by Smyth et al. (2019): Reference: 1) Smyth, Robert & Ibrahim, Nizar & Kao, Alexander & Martill, David. (2019). Abelisauroid cervical vertebrae from the Cretaceous Kem Kem beds of Southern Morocco and a review of Kem Kem abelisauroids. Cretaceous Research. 108. 104330. 10.1016/j.cretres.2019.104330. 2 Link to comment Share on other sites More sharing options...
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