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Re: [RECEIVED] Re: Prognathodon (Mosasauridae) had shark-like hypocercal tail fin



PDF received. 


Thanks all. 


Jason

----- Original Message -----
> From: Jura <pristichampsus@yahoo.com>
> To: "dinosaur@usc.edu" <dinosaur@usc.edu>
> Cc: 
> Sent: Tuesday, 10 September 2013 12:49 PM
> Subject: [PDF REQUEST] Re: Prognathodon (Mosasauridae) had shark-like 
> hypocercal tail fin
> 
> Could anyone with access to the paper pass it along to me. 
> 
> 
> Thanks,
> 
> Jason
> 
> 
> 
> ----- Original Message -----
>>  From: Ben Creisler <bcreisler@gmail.com>
>>  To: dinosaur@usc.edu
>>  Cc: 
>>  Sent: Tuesday, 10 September 2013 11:27 AM
>>  Subject: Prognathodon (Mosasauridae) had shark-like hypocercal tail fin
>> 
>>  From: Ben Creisler
>>  bcreisler@gmail.com
>> 
>> 
>>  A new paper in Nature Communications:
>> 
>> 
>> 
>>  Johan Lindgren, Hani F. Kaddumi & Michael J. Polcyn (2013)
>>  Soft tissue preservation in a fossil marine lizard with a bilobed tail fin.
>>  Nature Communications 4, Article number: 2423
>>  doi:10.1038/ncomms3423
>>  http://www.nature.com/ncomms/2013/130910/ncomms3423/full/ncomms3423.html
>> 
>> 
>> 
>>  Mosasaurs are secondarily aquatic squamates that became the dominant
>>  marine reptiles in the Late Cretaceous about 98–66 million years ago.
>>  Although early members of the group possessed body shapes similar to
>>  extant monitor lizards, derived forms have traditionally been
>>  portrayed as long, sleek animals with broadened, yet ultimately
>>  tapering tails. Here we report an extraordinary mosasaur fossil from
>>  the Maastrichtian of Harrana in central Jordan, which preserves soft
>>  tissues, including high fidelity outlines of a caudal fluke and
>>  flippers. This specimen provides the first indisputable evidence that
>>  derived mosasaurs were propelled by hypocercal tail fins, a hypothesis
>>  that was previously based on comparative skeletal anatomy alone.
>>  Ecomorphological comparisons suggest that derived mosasaurs were
>>  similar to pelagic sharks in terms of swimming performance, a finding
>>  that significantly expands our understanding of the level of aq
> 
>> 
>>  News stories:
>> 
>> 
> http://news.nationalgeographic.com/news/2013/09/130910-mosasaur-sea-monster-reptile-tail-ocean-science/
>> 
>>  http://www.livescience.com/39518-marine-lizard-with-shark-tail.html
>> 
>