Re: [dinosaur] Vascular integumentary structures on dinosaur skull roofs (free pdf)

A free pdf link to the article:

https://urldefense.proofpoint.com/v2/url?u=https-3A__people.ohio.edu_witmerl_Downloads_2019-5FHolliday-5Fet-5Fal.-5Fsignificance-5Fof-5Fthe-5Ffrontoparietal-5Ffossa-5Fof-5Farchosaurs.pdf&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=SmvRgSliLsgpJDJSVepB4EZUFx__6J6xTfHpttMoHAk&s=xDjB96ZJv6qZnG0LrEO_WBM4hEJgn9r7ey2VlBWOxxk&e= 


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=SmvRgSliLsgpJDJSVepB4EZUFx__6J6xTfHpttMoHAk&s=PEddeySiTOVBpIeTFDiJHKMT8dIuyXobQ9il5z9iLUA&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=SmvRgSliLsgpJDJSVepB4EZUFx__6J6xTfHpttMoHAk&s=plDidbBpdIp-DHxBOyZ8D4DmVY6Wt9hnHsgrKvhjDJ4&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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