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Re: [dinosaur] Triopticus, new dome-headed stem archosaur from Late Triassic of Texas (free pdf)



As many people would know, pachycephalosaur-like domes have also been
found in the Late Triassic of India.  The obvious question now is do
they belong to a close relative of _Triopticus_?  AFAIK, this Indian
(Maleri) material has not been formally described, but it's popped up
on the DML a few times, ever since a passing mention in a SVP
presentation by Sankar Chatterjee a (long) while back.

http: //dml.cmnh.org/1998Oct/msg00142.html
http: //dml.cmnh.org/2000Apr/msg00508.html
http: //dml.cmnh.org/2000Apr/msg00524.html
http: //dml.cmnh.org/2003Dec/msg00025.html

On Fri, Sep 23, 2016 at 2:17 AM, Ben Creisler <bcreisler@gmail.com> wrote:
>
> Ben Creisler
> bcreisler@gmail.com
>
>
> A new paper:
>
> Michelle R. Stocker, Sterling J. Nesbitt, Katharine E. Criswell, William G.
> Parker, Lawrence M. Witmer, Timothy B. Rowe, Ryan Ridgely & Matthew A. Brown
> (2016)
> A Dome-Headed Stem Archosaur Exemplifies Convergence among Dinosaurs and
> Their Distant Relatives.
> Current Biology (advance online publication)
> DOI: 
> https://urldefense.proofpoint.com/v2/url?u=http-3A__dx.doi.org_10.1016_j.cub.2016.07.066&d=DQIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=cS1HQ-lBshwiYPq7Bn8eq2XK4AeZOHplO5et5U6pk64&s=oxYjoPFQ4MdsXKyHmFHotcOtDYSd4jXWLjhyANh6p_4&e=
>  
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.cell.com_current-2Dbiology_fulltext_S0960-2D9822-2816-2930860-2D0&d=DQIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=cS1HQ-lBshwiYPq7Bn8eq2XK4AeZOHplO5et5U6pk64&s=iq4drlBuxHiMf30RIXlI8Vre3_X1TeYxfaieqao0WlU&e=
>  
>
>
> pdf:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.cell.com_current-2Dbiology_pdf_S0960-2D9822-2816-2930860-2D0.pdf&d=DQIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=cS1HQ-lBshwiYPq7Bn8eq2XK4AeZOHplO5et5U6pk64&s=3M5I5VuL9fPklpM8b3ZNqUbkngpkpz39K75CNGMds88&e=
>  
>
>
> Following the end-Permian extinctions, crown-group reptiles underwent an
> extensive diversification. From this radiation, archosauromorphs (reptiles
> closer to birds and crocodylians than to squamates) preserve one of the most
> diverse and disparate fossil records within Reptilia. The oldest and
> best-documented terrestrial record of this archosauromorph diversification
> in North America is the Late Triassic Otis Chalk assemblage. This assemblage
> includes an exceptional range of disparate cranial morphologies, dental
> modifications, and overall bauplans. Common clades in this assemblage are
> phytosaurs, with hyper-elongated and narrow rostra that have invoked
> statements of convergence with extant crocodylians, and armored aetosaurs,
> resembling the Cretaceous tank-like ankylosaurian dinosaurs. Reevaluation of
> the Otis Chalk assemblage (Supplemental Information) has illuminated further
> examples of convergent morphology, such as a shuvosaurid similar to Effigia
> that mimics the ornithomimid “ostrich-dinosaurs”. Exemplifying this extreme
> morphological convergence, we present here a new dome-headed taxon from the
> assemblage, which further illustrates the extraordinary range of
> morphological disparity present early in the Late Triassic.
>
>
>
> ===
>
>
>
> News:
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.org_news_2016-2D09-2Dbizarre-2Dspecies-2Dextinct-2Dreptile-2Ddinosaurs.html&d=DQIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=cS1HQ-lBshwiYPq7Bn8eq2XK4AeZOHplO5et5U6pk64&s=GbNE5iunTiWVAFID7J4CUDFagb8x_3e6CwSO8JIyD44&e=
>  
>
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.smithsonianmag.com_science-2Dnature_paleontologists-2Dpuzzle-2Dover-2Dfirst-2Dbonehead-2D180960543_&d=DQIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=cS1HQ-lBshwiYPq7Bn8eq2XK4AeZOHplO5et5U6pk64&s=_09DiJryFBGOyTYEn912huNTnNRI_avTpGpIyfTqkvU&e=
>  
>
>
>