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Re: [dinosaur] Scansoriopterygids and basal oviraptorosaurians, climbing and flight ability



To quote Nick Fury ('Spider-Man - Far From Home'):   "See, now that's
some bullshit."



On Tue, Dec 15, 2020 at 3:26 AM Ben Creisler <bcreisler@gmail.com> wrote:
>
>
> Ben Creisler
> bcreisler@gmail.com
>
> A new paper:
>
>
> Boris Sorkin (2020)
> Scansorial and aerial ability in Scansoriopterygidae and basal 
> Oviraptorosauria.
> Historical Biology (advance online publication)
> DOI: 10.1080/08912963.2020.1855158
> https://urldefense.com/v3/__https://www.tandfonline.com/doi/full/10.1080/08912963.2020.1855158__;!!LIr3w8kk_Xxm!8oGQNdJq-gs89xJurgTh4vuXqqHj7VlfUV-BUjI7RwUdkI1yXUgmAXo0y6HACJEY$
>  
>
>
> Previously proposed hypothesis that known terrestrial and flightless members 
> of the pennaraptoran clade Oviraptorosauria (Dinosauria: Theropoda) evolved 
> from scansorial and volant ancestors is evaluated by reviewing publications 
> on the phylogenetic position and morphology of the pennaraptoran clade 
> Scansoriopterygidae. Publications on the phylogenetic relationships of basal 
> members of the pennaraptoran clade Paraves and morphology of recently 
> discovered basal paravians were also reviewed to re-evaluate a previously 
> supported hypothesis that terrestrial and flightless members of the paravian 
> clade Deinonychosauria evolved from scansorial and volant ancestors. 
> Uncertainty about the phylogenetic position of Scansoriopterygidae among 
> basal pennaraptorans suggests that scansoriopterygid morphology is close to 
> the ancestral morphology of Pennaraptora. Functional morphology indicates 
> that all known scansoriopterygids were capable of scansorial locomotion and 
> gliding, but not active flight, suggesting that the most recent common 
> ancestor of Pennaraptora was also a scansorial glider and therefore, supports 
> the descent of known terrestrial and flightless Oviraptorosauria from 
> scansorial and volant ancestors. This evolutionary scenario (supported by 
> phylogenetic analyses and functional morphology) supports the evolution of 
> pennaceous feathers as a flight adaptation and the âfrom the trees downâ 
> hypothesis of bird flight evolution.
>
> ==============
>
> Virus-free. 
> https://urldefense.com/v3/__http://www.avg.com__;!!LIr3w8kk_Xxm!8oGQNdJq-gs89xJurgTh4vuXqqHj7VlfUV-BUjI7RwUdkI1yXUgmAXo0y2RsndXi$
>