tag:blogger.com,1999:blog-3248412803814730250.post1179358193322104728..comments2024-03-17T01:48:59.504-07:00Comments on The Theropod Database Blog: No giant Egyptian DeltadromeusMickey Mortimerhttp://www.blogger.com/profile/08831823442911513851noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-3248412803814730250.post-19146457661226963402022-02-13T15:56:46.570-08:002022-02-13T15:56:46.570-08:00If the description from Ibrahim et al.(2020a) is c...If the description from Ibrahim et al.(2020a) is correct I agree it's the M. adductor femoris 2.In any case,I still disagree that BSPG 1912 VIII 69 is D.agilis,and we lack a B.ingens femur to verify Stromer's original identification.<br />The femora do exhibit differences,with the Bahariya specimen having a shorter and distally placed fourth trochanter and lacking the anteromedial flange.I think these differences might prove to be phylogenetically relevant.<br />I agree on the pectoral girdle,not similar in any aspect to D.agilis.It's also quite different from Masiakasaurus,Elaphrosaurus and Gualicho,so I think it's not related to them.It was part of an associated specimen,but this was ignored by Ibrahim et al.(2020a).The associated caudals are similar to B.ingens and the differences,I think,might be positional.<br />I thought it could be better to respond here to your other comment.<br />The position of A.libertatem within Megaraptora is surprisingly in line with previous suggestions.I'm not so sure on the others.<br />Also,have you tried to code B.ingens for all the specimens you list as referable and not only the "holotype"?<br />Manuel Breahttps://www.blogger.com/profile/09714976605294933541noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-46859828374952316732022-02-12T20:02:24.020-08:002022-02-12T20:02:24.020-08:00Yeah, Ibrahim et al. (2020) clarified it projected...Yeah, Ibrahim et al. (2020) clarified it projected "posteriorly from the posterolateral edge of the shaft below the fourth trochanter", but based on figure 6 of Carrano and Hutchinson (2002) a lateral process here is the M. adductor femoris 2. This matches the Baharija femur and Teratophoneus, whereas a medial process like Shanshanosaurus' is the M. adductor femoris 1. In any case, I've revised my view of BSPG 1912 VIII 69 based on Ibrahim et al.'s comments (see the Database Deltadromeus entry), but still think the pectoral girdle doesn't belong and am ambivalent about the other material.<br />Ref- Carrano and Hutchinson, 2002. Pelvic and hindlimb musculature of Tyrannosaurus rex (Dinosauria: Theropoda). Journal of Morphology. 253, 207-228.Mickey Mortimerhttps://www.blogger.com/profile/08831823442911513851noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-53227529809790410762022-01-31T11:00:25.640-08:002022-01-31T11:00:25.640-08:00Regarding the femur,the anterior expansion of the ...Regarding the femur,the anterior expansion of the median condyle is also present in Teratophoneus curriei (Loewen et al.,2013;Fig.1k) and Ekrixinatosaurus novasi (Calvo,Rubilar-Rogers & Moreno,2004;Fig.7).<br />The "Accessory trochanter" of D.agilis,if it's the distolateral flange as implied by Ibrahim et al.,2020a,is not different from Tyrannosaurids(e.g.T.currie,T.rex) and the distal femur BSPG 1912 VIII 85.T.curriei displays the long and posteriorly projected flange seen in BSPG 1912 VIII 69,which arises distally to the M. adductor femoris 2 in lateral view.<br />Also,the M. adductor femoris 1 can be exposed in lateral view,as it's the case in Shanshanosaurus huoyanshanensis.If the "Acc.trochanter" is this scar,I suppose it should be well exposed (in lateral view) in D.agilis.<br />Stromer(1934) notes there's no flange on the anterodistal part of the femur.It's stated that (translated) "Medial from it a longitudinal edge and a surface for muscle insertion is missing",this seems to be in reference to the aforementioned flange.<br />Refs:<br />1)Stromer, E. (1934). Ergebnisse der Forschungsreisen Prof. E. Stromers in den Wüsten Ägyptens. II. Wirbeltier-Reste der Baharije-Stufe (unterstes Cenoman). 13. Dinosauria. Abhandlungen der Bayerischen Akademie der Wissenschaften, Mathematisch-naturwissenschaftliche Abteilung n.f., 22: 1–79.<br />2)Brochu, Christopher. (2003). Osteology of Tyrannosaurus rex: Insights from a Nearly Complete Skeleton and High-Resolution Computed Tomographic Analysis of the Skull. Journal of Vertebrate Paleontology - J VERTEBRATE PALEONTOL. 22. 1-138. 10.1080/02724634.2003.10010947.<br />3)Calvo, Jorge & Rubilar-Rogers, David & Moreno, Karen. (2004). A new Abelisauridae (Dinosauria: Theropoda) from northwest Patagonia. Ameghiniana. 41. 555-563. <br />4)Currie, Philip & Dong, Zhiming. (2011). New information on Shanshanosaurus huoyanshanensis, a juvenile tyrannosaurid (Theropoda, Dinosauria) from the Late Cretaceous of China. Canadian Journal of Earth Sciences. 38. 10.1139/cjes-38-12-1729.<br />5)Loewen MA, Irmis RB, Sertich JJW, Currie PJ, Sampson SD (2013) Tyrant Dinosaur Evolution Tracks the Rise and Fall of Late Cretaceous Oceans. PLoS ONE 8(11): e79420. https://doi.org/10.1371/journal.pone.0079420<br />6)Ibrahim, Nizar & Sereno, Paul & Varricchio, David & Martill, David & Dutheil, Didier & Unwin, David & Baidder, Lahssen & HCE, Larsson & Zouhri, Samir & Kaoukaya, Abdelhadi. (2020). Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco. ZooKeys. 928. 10.3897/zookeys.928.47517.<br />Manuel Breahttps://www.blogger.com/profile/09714976605294933541noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-69283777094801188622014-11-10T23:26:45.900-08:002014-11-10T23:26:45.900-08:00Good question on Bahariasaurus, I'm looking in...Good question on Bahariasaurus, I'm looking into that myself. Previously I argued it was a basal ceratosaur possibly synonymous with Deltadromeus, but since I finally got the Stromer 1934 translation, I'm not sure. The posterior dorsals and at least anterior sacrals have pleurocoels, which I don't think is present in theropods outside Orionides. There's also a proximally placed interpubic fenestra, which I don't think is present outside Tetanurae, and ventrally grooved sacrals which sound coelurosaur-like. The ischium has a mid dorsal process as in metriacanthosaurids and some other taxa. Plus everyone's discounted the referred material, but while some lacks any overlap, others do overlap it and Stromer claims some is identical to the holotype. So we also have cervicals and caudals, for instance. If you want the translation just email me at Mickey_Mortimer111 @ msn.com .Mickey Mortimerhttps://www.blogger.com/profile/08831823442911513851noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-13105896637103312972014-11-10T10:45:34.075-08:002014-11-10T10:45:34.075-08:0079 pages. I wish I had time to translate that much...79 pages. I wish I had time to translate that much.<br /><br /><i>Spinosaurus</i> B was in the analysis of the <i>Ichthyovenator</i> poster; it came out as part of the spinosaurine mess.David Marjanovićhttps://www.blogger.com/profile/00233722577300632805noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-26008338689614500872014-11-08T18:24:57.629-08:002014-11-08T18:24:57.629-08:00Sorry for the late comment, but these questions ha...Sorry for the late comment, but these questions have been bugging me recently: What's the current consensus on Bahariasaurus? Is it a primitive ceratosaur or something else? Is it synonymous with Deltadromeus or not? Many thanks in advance.<br /><br />-JD-manraptor_044https://www.blogger.com/profile/10538231485096397412noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-47324629322488338242014-10-04T01:56:49.954-07:002014-10-04T01:56:49.954-07:00Thanks and soon. According to Nick Gardner, who m...Thanks and soon. According to Nick Gardner, who manages my webhost, should be up today.Mickey Mortimerhttps://www.blogger.com/profile/08831823442911513851noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-35629419988158155722014-10-01T08:12:24.457-07:002014-10-01T08:12:24.457-07:00Hi I want ask about Theropod Database, When will b...Hi I want ask about Theropod Database, When will be working?<br /><br />BestShahenhttps://www.blogger.com/profile/06908901225271589857noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-72114027895053428742014-09-20T03:47:34.153-07:002014-09-20T03:47:34.153-07:00Agreed in non referring that material to Deltadrom...Agreed in non referring that material to Deltadromeus. In fact, in my dataset the latter is scored exclusively on the Moroccan material.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.com