Re: [dinosaur] Miragaia new specimen and taxonomy of dacentrurine stegosaurs (free pdf)

The abstract's final sentence understates their point: they sink
Alcovasaurus into Miragaia.

On Wed, Nov 13, 2019 at 1:55 PM Ben Creisler <[email protected]> wrote:

>
> Ben Creisler
> [email protected]
>
> A new paper in open access:
>
> Francisco Costa & Octávio Mateus (2019)
> Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia
> longicollum from the Late Jurassic of Portugal resolves taxonomical
> validity and shows the occurrence of the clade in North America
> PLoS ONE 14(11): e0224263.
> doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1371_journal.pone.0224263&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=iATxymuSjwCT_-kNZ68CEEUdVs1eEVWPVsoL2pxWhwQ&s=LVN1apDC3C7ZxIUjr4gwQVbENt9Zeag_kU2vHRQC52A&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1371_journal.pone.0224263&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=fmSVOFJKdh-s0pB9kpyAFl9wOxuMW6iNvgG-pAimXOs&s=mfZpLpCjxbg6qsrNePdx3Fwz8c1jn0iZAuyKBqm6a5g&e=>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.plos.org_plosone_article-3Fid-3D10.1371_journal.pone.0224263&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=iATxymuSjwCT_-kNZ68CEEUdVs1eEVWPVsoL2pxWhwQ&s=XUADNsQWXgDRi8Y42nG07xl3AiaN0-6tsfTe54Dt8Ps&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.plos.org_plosone_article-3Fid-3D10.1371_journal.pone.0224263&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=fmSVOFJKdh-s0pB9kpyAFl9wOxuMW6iNvgG-pAimXOs&s=QNOvbAs4z1ltAxhIgR8txq2WbN1L0OIWdkr-hKMJn60&e=>
> Free pdf:
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.plos.org_plosone_article_file-3Fid-3D10.1371_journal.pone.0224263-26type-3Dprintable&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=iATxymuSjwCT_-kNZ68CEEUdVs1eEVWPVsoL2pxWhwQ&s=a1RzDv0BkJPucHHy3u_qHh2Ipp0DMt3c40XSZJXzyUA&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.plos.org_plosone_article_file-3Fid-3D10.1371_journal.pone.0224263-26type-3Dprintable&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=fmSVOFJKdh-s0pB9kpyAFl9wOxuMW6iNvgG-pAimXOs&s=FdHL1hFBYpTpUZlCnXvQRVRH6fAQtz6oTBR875o6frw&e=>
>
> The stegosaur species Miragaia longicollum was erected based on a partial
> anterior skeleton from the Upper Jurassic of Portugal. Until then, almost
> all stegosaur specimens in Portugal and Spain had been identified as
> Dacentrurus armatus, the sister taxon of M. longicollum and only other
> member of the clade Dacentrurinae. The holotypes of the two species have
> little overlap, since the holotype of D. armatus is mostly a posterior
> skeleton, so the classification of other specimens to either species is
> unclear and the validity of M. longicollum has been questioned and debated.
> Here we describe a largely complete specimen of M. longicollum discovered
> in 1959 in Atouguia da Baleia, Peniche, Portugal, consisting of both
> anterior and posterior portions of the skeleton. Comparisons to the
> holotypes of dacentrurines and other stegosaurs shed light on the
> convoluted relationships of this group. We conclude that M. longicollum is
> valid and rather different from D. armatus, and provide a revised diagnosis
> of M. longicollum, as well as revised diagnoses for D. armatus,
> Dacentrurinae, and the first diagnosis of the genus Miragaia, granting
> stability to these taxa and allowing new considerations to be given on the
> classification of other Iberian stegosaurs. This new specimen is, to date,
> the most complete dinosaur described from Portugal and the most complete
> stegosaur described from Europe. Miragaia shared anatomical features that
> show a close affinity to Alcovasaurus longispinus, confirming this to be
> the first known dacentrurine stegosaur in America, coherent with the
> hypothesis of an ephemeral land bridge between North America and Iberia
> that allowed faunal exchange.
>
>

-- 

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