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[dinosaur] Confuciusornis beak + Sauriermuseum Frick + Paleo Roundtable 3 + Matyas Vremir +



Ben Creisler
bcreisler@gmail.com

Some recent items:

AbstractÂonly for now:

Xiaoting Zheng, Jingmai Kathleen O'Connor, Yan Wang, Xiaoli Wang, Yin Xuwei, Xiaomei Zhang and Zhonghe Zhou (2020)
New information on the keratinous beak of Confuciusornis (Aves: Pygostylia) from two new specimens.ÂÂ
Frontiers in Earth Science (abstract)
doi: 10.3389/feart.2020.00367
https://www.frontiersin.org/articles/10.3389/feart.2020.00367/abstract


The keratinous beak is inferred to have evolved multiple times in the Archosauria and in Aves. Unfortunately, this feature rarely preserves in the fossil record. Here we examine a collection of 603 specimens belonging to the Confuciusornithiformes, a clade of edentulous basal avians, only two of which preserve visible traces of the rhamphotheca. Preservation is very different between the two specimens, offering no clues as to the taphonomic conditions that are conducive to preservation of this feature. These differences suggest that preservation of the rhamphotheca is not limited to a very narrow set of specific chemical conditions. We suggest the more common preservation of feathers over rhamphotheca is due to the higher melanin content in the former. The well-preserved traces in one specimen described here suggests that the rhamphotheca covering the upper and lower jaws each may consist of a pair of right and left elements, thus differing from the condition in neornithines in which the premaxillary nail and mandibular nail covering the rostral half of the upper and lower jaws respectively each form a single unit.

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Marine reptile forefins

Dolphins, seals, and ichthyosaurs

https://www.nytimes.com/2020/08/08/science/dolphins-fingers-ichthyosaurs.htmlÂ

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Usan un mÃtodo de redes sociales para explicar cÃmo distintas especies transformaron sus patas en aletas (with video) (in Spanish)

https://laplata.conicet.gov.ar/usan-un-metodo-de-redes-sociales-para-explicar-como-distintas-especies-transformaron-sus-patas-en-aletas/

Note that the video in English can be viewed and downloaded at:

Animation of Âmarine reptile forefin construction

https://rs.figshare.com/articles/media/Animation_mp4_from_Fingers_zipped_up_or_baby_mittens_Two_main_tetrapod_strategies_to_return_to_the_sea/12756393/1

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3rd Centrum A Paleo Roundtable with Drs. Thomas Carr, ÂWin McLaughlin, Victoria Arbour, and ÂMatt Lamanna
Great Plains Dinosaur Museum (video)

https://www.youtube.com/watch?v=7V-JNmGsWNE

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Timur Sivgin from the Sauriermuseum Frick in Switzerland (Plateosaurus and other Triassic fossils)

https://chasmosaurs.com/2020/08/09/guest-post-timur-sivgin-at-sauriermuseum-frick/

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Romanian paleontologist MÃtyÃs Vremir obituary by Steve Brusatte

https://www.theguardian.com/science/2020/aug/09/matyas-vremir-obituary

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Fill in the blanks with discovery guide Jurassic James Washington at Houston Museum of Natural History

http://blog.hmns.org/2020/07/fill-in-the-blanks-with-discovery-guide-jurassic-james-washington/

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What is taxonomy?

https://www.livescience.com/taxonomy.html


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non-dino stuff:


Ankylorhiza tiedemani, a giant dolphin from the Oligocene of South Carolina, part 2: the ecology, evolution, and swimming adaptations of Ankylorhiza

https://coastalpaleo.blogspot.com/2020/08/ankylorhiza-tiedemani-giant-dolphin_9.html

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Miocene (Pt 21): Mongooses and More

https://synapsida.blogspot.com/2020/08/miocene-pt-21-mongooses-and-more.html

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