tag:blogger.com,1999:blog-7407486920844354583.post1261860186223644455..comments2023-12-20T07:40:56.484+00:00Comments on Raptor's Nest: New paper: jaw biomechanics and the evolution of biting performance in theropod dinosaursRaptor's Nesthttp://www.blogger.com/profile/01451618880276065935noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-7407486920844354583.post-37451108078278085962012-10-06T22:25:18.785+01:002012-10-06T22:25:18.785+01:00You might have heard of this, but a specimen of Te...You might have heard of this, but a specimen of Tenontosaurus was discovered a while ago that seemed to have bite marks from Deinonychus in the cortices of its bones. The force required to puncture the bones was around 4100 N and they calculated that the animal was capable of exerting around twice that force. Now, I might be misinterpreting the implications of your results, but how does this fit with the biomechanical profile of dromaeosaurs as weak/fast biters? <br />Here is a link to the article: <br />http://www.tandfonline.com/doi/abs/10.1080/02724634.2010.483535<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-19013638275071374632010-06-25T15:15:06.589+01:002010-06-25T15:15:06.589+01:00Thank you,
I discussed that reconstruction in my ...Thank you,<br /><br />I discussed that reconstruction in my blog, but it's not published in a paper.<br /><br />If you would like to test it (just for fun) I would be very happy interested to know the result.<br /><br />:-)Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-73935736758718818982010-06-25T13:31:42.630+01:002010-06-25T13:31:42.630+01:00Hi Andrea,
Wow, cool reconstruction! I'm pre...Hi Andrea,<br /><br />Wow, cool reconstruction! I'm pretty sure your interpretations are likely true. Are you preparing it for publication in any way? I limited myself to published reconstructions (or my own composites based on published materials), so that's why Spinosaurus is represented by that of Dal Sasso et al., (2005). It would indeed be very interesting to see what biting profile would look like using your reconstruction - I think I'll do that if you don't mind (just for fun).<br /><br />I did make some of my own reconstructions for some taxa, but I didn't for Spinosaurus.Raptor's Nest (old)https://www.blogger.com/profile/11093451947295359924noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-392292202762869762010-06-25T13:11:04.311+01:002010-06-25T13:11:04.311+01:00Thank you for the answers.
Regarding the "Sp...Thank you for the answers.<br /><br />Regarding the "Spinosaurus" skull by Dal Sasso et al. (2005), I've discussed with Simone Maganuco (co-author of Sal Sassi and author of the skull drawing you used) on a different interpretation of the spinosaur postorbital region, based on the assumption that the postorbital region was more ventrally flexed relative to the preorbital one. My hypothesis is based on the unusual shape of the lacrimal in spinosaurids, on Henderson (2002) study on skull and orbit shape in theropod skulls, and on basicranial proportion in spinosaurids: it is similar to the "baryonychid" skull in Rauhut (2003). <br />This different hypothesis produces a snout more rostroventrally directed compared to the "standard one", in particular when the occipital region is oriented vertically.<br />You can see my hypothesis drawn here: http://4.bp.blogspot.com/_6fVePgcYTJc/SXmgFw1x1kI/AAAAAAAABkU/KI1NLvGW1-M/s400/Spinosaurus+skull.jpg<br /> <br />It should be interesting to see where these alternative spinosaurid skulls result in your analysis.<br /><br />All the best,Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-82660390023552822352010-06-20T12:02:46.237+01:002010-06-20T12:02:46.237+01:00Hi Andrea,
Thanks for the questions.
1, I used t...Hi Andrea,<br /><br />Thanks for the questions.<br /><br />1, I used the relatively recent reconstruction by Dal Sasso et al. (2005). Their reconstruction of the postorbital region is based largely on Irritator so one could say that it is a composite 'generalised' spinosaurine.<br /><br />2, that is one of the reasons why coelophysoids and basal taxa such as Herrerasaurus and even the outgroup Plateosaurus have extremely high mechanical advantages at the back of the tooth row.Raptor's Nest (old)https://www.blogger.com/profile/11093451947295359924noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-16933110268918236822010-06-19T16:14:48.326+01:002010-06-19T16:14:48.326+01:00Two questions:
1- In your study, you included tax...Two questions:<br /><br />1- In your study, you included taxa known only from very fragmentary skulls (for example, Spinosaurus): since the back of some of these skulls is unknown, the how did you study their mechanical advantages?<br /><br />2- In tetanurans the distalmost (posteriormost) maxillary tooth is placed rostral to the lacrimal, whereas more basal taxa shows more distally placed tooth-row ends: how did these positional differences affect the result of the study?<br /><br />Best,Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-16436488373002931362010-06-18T17:36:06.955+01:002010-06-18T17:36:06.955+01:00Thanks for your reply, mr Sakamoto :)
At least now...Thanks for your reply, mr Sakamoto :)<br />At least now i know whats going on!<br />Then medias are bullshitting (as usual)<br />Im reading your paper right now...Fabriziohttps://www.blogger.com/profile/10970403972342514144noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-45753942973815487132010-06-15T20:06:34.077+01:002010-06-15T20:06:34.077+01:00Hi Fabrizio,
My paper has nothing to do with shar...Hi Fabrizio,<br /><br />My paper has nothing to do with sharks; it's the journalist making a sensational comparison... <br /><br />Wroe and colleagues did publish something on biting mechanics in Great Whites but I'm not entirely sure if they've done anything on megalodon...Raptor's Nest (old)https://www.blogger.com/profile/11093451947295359924noreply@blogger.comtag:blogger.com,1999:blog-7407486920844354583.post-80451824065321874032010-06-15T18:51:14.491+01:002010-06-15T18:51:14.491+01:00Please:
Doesnt the paper say anything bout Carchar...Please:<br />Doesnt the paper say anything bout Carcharocles bite, unlike medias reported?<br />http://www.nydailynews.com/lifestyle/2010/06/11/2010-06-11_prehistoric_shark_carcharodon_megalodon_had_biggest_bite_of_all_dinosaurs.html?r=lifestyle&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+nydnrss%2Flifestyle+%28Lifestyle%29<br />http://sify.com/news/prehistoric-shark-carcharodon-megalodon-s-bite-biggest-of-all-dinos-news-international-kgmnueghgff.html<br />http://www.newkerala.com/news/fullnews-126049.html<br /><br />Or maybe are there two different studies? Did Wroe published a DIFFERENT study featuring Carcharocles bite? Im confused<br />Id like to know, please<br />Thanks in advance :)Fabriziohttps://www.blogger.com/profile/10970403972342514144noreply@blogger.com