Re: [dinosaur] Vascular integumentary structures on dinosaur skull roofs

Now the subject of news items and blogs:


New discovery shows how T. rex kept its brain cool

https://urldefense.proofpoint.com/v2/url?u=https-3A__phys.org_news_2019-2D09-2Drex-2Dair-2Dconditioner.html&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=5crH1cPWvvdW--hraMqCiJKvsggQrMqEkcf2b3eqKY4&e= 

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nationalgeographic.com_science_2019_09_new-2Ddiscovery-2Dshows-2Dhow-2Dtyrannosaurus-2Drex-2Dkept-2Dits-2Dbrain-2Dcool_&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=ygWNa5vOj8T2ZtANmfWjwc2fQ6LvIdBcUfMoUvehuoY&e= 

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.smithsonianmag.com_science-2Dnature_special-2Dskull-2Dwindows-2Dhelped-2Ddinosaurs-2Dkeep-2Dtheir-2Dbrains-2Dkeep-2Dcool-2D180973036_&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=e6rp0MskrrQJi6KHrcgNhixQTArIogxPQXUkADrDX5A&e= 

https://urldefense.proofpoint.com/v2/url?u=http-3A__dontmesswithdinosaurs.com_-3Fp-3D2320&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=34uebcX7Is6XyvcgVL-ZJc9vofOw-1iFI-2WJuL05as&e= 


Video:
Tyrannosaurus rex thermal image

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.youtube.com_watch-3Ftime-5Fcontinue-3D2-26v-3DXIkqLAuz2EI&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=j9XuRSragmEyHMPZboCwN_MBaxipuAVrAaCz3NjR7Lg&e= 

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On Mon, Jul 1, 2019 at 9:27 AM Ben Creisler <[email protected]> wrote:

>
>
> Ben Creisler
> [email protected]
>
> A new paper:
>
> Casey M. Holliday, Wm. Ruger Porter, Kent A. Vliet & Lawrence M. Witmer
> (2019)
> The frontoparietal fossa and dorsotemporal fenestra of archosaurs and
> their significance for interpretations of vascular and muscular anatomy in
> dinosaurs.
> The Anatomical Record (advance online publication)
> doi:  https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1002_ar.24218&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=1Q6yk3hGcgX9RFBDMQueONmLqsIFDAqUUH6h2ki96Us&e= 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__onlinelibrary.wiley.com_doi_10.1002_ar.24218&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=6gIxDekIpF1M2pTdqY0zSJL7CMIT7u_v0SiFSzs438o&s=TyIG9F7OlYVL6v9jxJmxGQE2XANEg-fILfzS5aYE8Tg&e= 
>
>
> The attachments of jaw muscles are typically implicated in the evolution
> and shape of the dorsotemporal fenestra on the skull roof of amniotes.
> However, the dorsotemporal fenestrae of many archosaurian reptiles possess
> smooth excavations rostral and dorsal to the dorsotemporal fossa which
> closely neighbors the dorsotemporal fenestra and jaw muscle attachments.
> Previous research has typically identified this region, here termed the
> frontoparietal fossa, to also have been attachment surfaces for jaw‐closing
> muscles. However, numerous observations of extant and extinct archosaurs
> described here suggest that other tissues are instead responsible for the
> size and shape of the frontoparietal fossa. This study reviewed the
> anatomical evidence that support soft‐tissue hypotheses of the
> frontoparietal fossa and its phylogenetic distribution among sauropsids.
> Soft‐tissue hypotheses (i.e., muscle, pneumatic sinus, vascular tissues)
> were analyzed using anatomical, imaging and in vivo thermography techniques
> within a phylogenetic framework using extant and extinct taxa to determine
> the inferential power underlying the reconstruction of the soft tissues in
> the skull roofs of dinosaurs, pseudosuchians and other reptiles. Relevant
> anatomical features argue for rejection of the default hypothesis--that the
> fossa was muscular--due to a complete lack of osteological correlates
> reflective of muscle attachment. The most‐supported inference of soft
> tissues is that the frontoparietal fossa contained a large vascular
> structure and adipose tissue. Despite the large sizes and diverse
> morphologies of these fossae found among dinosaur taxa, these data suggest
> that non‐avian dinosaurs had the anatomical foundation to support
> physiologically‐significant vascular devices and/or vascular integumentary
> structures on their skull roofs.
>
>
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