Read the Beforeitsnews.com story here. Advertise at Before It's News here.
Profile image
Story Views
Now:
Last hour:
Last 24 hours:
Total:

Over the elbow or under? Pterosaur wing folding problem solved.

% of readers think this story is Fact. Add your two cents.


Figure 1. Finally a pterosaur that preserves the wing finger over the elbow solves the minor problem of wing folding. This is hard evidence that means, over time, I’m going to have change a few reconstructions. Also note the robust ribs and wide scapulae here. The coracoid was not fused to it. Elbows are back, not out. There’s also a notarium you can see.

Pterosaurs folded their wings so tightly that the membrane virtually disappeared between a parallel antebrachium and wing finger (unlike the widely disseminated traditional view that keeps the wing finger open to handle the false deep chord wing membrane construction). The only question has been, does the wing finger fold medial (inside) to the elbow or lateral (outside) to the elbow? Having built several model skeletons, I thought the inside offered better protection and didn’t violate any rules.

Now we have a specimen attributed to Noripterus GIN125/1010 (Lü et al. 2009) that preserves this configuration lateral (outside, dorsal) to the elbow. The specimen is quite a bit smaller than the Noripterus holotype. Distinctively the metacarpus is shorter with regard to the tibia on GIN specimen, so the two are probably not conspecific (or congeneric, depending if you’re a splitter or a lumper). The GIN specimen is closer to Germanodactylus.

This is also the first specimen of a dsungaripterid I’ve seen that preserves the scapula, which appears to NOT fuse to the coracoid, similar to what we see in Shenzhoupterus, Noripterus and basal tapejarids. On the other hand, the more primitive Germanodactylus has a fused scapulocoracoid. So, fancy that, the smaller taxon has a fused s/c and the larger ones don’t (until we come to the larger tapejarids).

Figure 1. The new Noripterus to scale with Germanodactylus cristatus (left) and a chimaera of Phobetor and the holotype of Noripterus (right). Long-legged bastards, aren’t they? Here you can also see proportional differences between the holotype Noripterus (on the right) and the attributed specimen (in the middle). 

References
Lü J, Azuma Y, Dong Z, Barsbold R, Kobayashi Y and Lee Y-N 2009. New material of dsungaripterid pterosaurs (Pterosauria: Pterodactyloidea) from western Mongolia and its palaeoecological implications. Geological Magazine, 146(5): 690-700.



Source: http://pterosaurheresies.wordpress.com/2013/06/09/over-the-elbow-or-under-pterosaur-wing-folding-problem-solved/


Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!


Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST


Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Immusist Beverage Concentrate - Proprietary blend, formulated to reduce inflammation while hydrating and oxygenating the cells.

Report abuse
Loading...

    Comments

    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    MOST RECENT
    Load more ...

    SignUp

    Login

    Newsletter

    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.