[dinosaur] Asfaltovenator, new basal allosauroid from Middle Jurassic of Argentina (free pdf)

Ben Creisler
[email protected]

A new paper in open access:

Asfaltovenator vialidadi gen. et sp. nov.

Oliver W. M. Rauhut & Diego Pol (2019)
Probable basal allosauroid from the early Middle Jurassic Cañadón Asfalto
Formation of Argentina highlights phylogenetic uncertainty in tetanuran
theropod dinosaurs.
Scientific Reports 9, Article number: 18826
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1038_s41598-2D019-2D53672-2D7&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=ySZoPNHp5FyJDc_62tGlBh54XT00PaVUWapbH2XMeOA&s=glZpnYWSK-9wCn2ctzHVJ8SYX5RhDOp7569UgyxI0A8&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D53672-2D7&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=ySZoPNHp5FyJDc_62tGlBh54XT00PaVUWapbH2XMeOA&s=LvNgVlj8D4CJtAZarkyWd9D2bgUaI0SETCs9C14h5fQ&e= 

Free pdf:
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D53672-2D7.pdf&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=ySZoPNHp5FyJDc_62tGlBh54XT00PaVUWapbH2XMeOA&s=kIzufHWEcDP0XB9cnz7Z6IfFxcqyU7qOZl3spkuFccA&e= 



Tetanurae, the most successful clade of theropod dinosaurs, including
modern birds, split into three major clades early in their evolutionary
history: Megalosauroidea, Coelurosauria, and Allosauroidea. The oldest
tetanurans occur in the earliest Middle Jurassic, but the early fossil
record of the clade is still poor. Here we report one of the oldest known
and most complete pre-Late Jurassic tetanuran, the probable allosauroid
Asfaltovenator vialidadi gen. et sp. nov., which has an unusual character
combination, uniting features currently considered to be apomorphic of
different tetanuran lineages. A phylogenetic analysis resulted in a
monophyletic Carnosauria (Allosauroidea + Megalosauroidea), and the
inclusion of the new taxon significantly changes topology within
carnosaurs. The analysis shows concentrated homoplasy in proximal nodes at
the base of Tetanurae, and a temporal peak at the Pliensbachian-Toarcian
extinction event, recently identified as a potential driver of tetanuran
radiation. These results highlight the complex morphological evolution in
the early radiation of tetanuran theropods, in which convergences and
parallelisms were extremely common. This pattern seems to be a common
feature in rapid radiation events of major clades of vertebrates and might
explain the common difficulties to unravel phylogenetic relationships of
important lineages at the base of major clades.

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Also:
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.lanacion.com.ar_ciencia_asfaltovenator-2Dvialidadi-2Dhallan-2Dpatagonia-2Duno-2Dmas-2Dantiguos-2Dnid2314701&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=ySZoPNHp5FyJDc_62tGlBh54XT00PaVUWapbH2XMeOA&s=w3ouCcMLv20ooYDF1LsZID_DOgRb3_FDCcNm-R42PyA&e= 

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.diariojornada.com.ar_261290_sociedad_dinosaurios-5Fun-5Fnuevo-5Fhallazgo-5Fen-5Fchubut-5Fda-5Fclaves-5Fsobre-5Fla-5Fevolucion-5Fde-5Flos-5Fteropodos_&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=ySZoPNHp5FyJDc_62tGlBh54XT00PaVUWapbH2XMeOA&s=S38ECrQOml1P1CglsWmR-lGx3wRX97mSE9mFupfPDg4&e=