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Tropeognathus robustus

By paleopeter
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Update 29 12 2019
Species: T. mesembrinus, T. robustus.
Meaning of name: Keel jaw.
Brazil, Early Cretaceous.
Classification: Pterosauria, Pterodactyloidea, Ornithocheiridea.
Wingspan: 6.2m.
Lifestyle: Piscivore.
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Comments8
anonymous's avatar
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DinoBirdMan's avatar
It looks like Ornithocheirus from Walking with Dinosaurs on BBC.
paleopeter's avatar

Tropeognathus is a member of the Ornithocheiridae & may be the same as Ornithocheirus but robustus has a triangular extension at the front of its lower jaw.

Dontknowwhattodraw94's avatar
How big did they actually grow? I've always grown up with the Ornithocheirus from Walking With Dinosaurs where it's a giant with a wingspan of 12 metres, but that's actually the only recource that says it was this big. If you look at wikipedia or other sites they say it had a wing span of 6 metres or something like that so which Ornithocheirus is the right one?
paleopeter's avatar

There are claims of Santana ornithocheirids with wingspans up to 9m (Dalla Vicchia and Ligabue 1993) but based on fragmentary remains. However it is generally accepted that Pterosaurs & Dinosaurs had a growth pattern more like crocodiles and old individuals could get very big, Most didn’t make it and giants were rare. I read that based on growth rings the average age for a Tyrannosaurus was 12 and a weight of 2 tones but for the media that doesn’t put bums in seats. I like your name :)

 
Dontknowwhattodraw94's avatar
Oh okay, so in theory it would be possible for an ornithocheirus to become that big? Didn't know they had this growth pattern. If you think about it, every dinosaur we know could've become even bigger than the specimens we know of. Imagine a T-rex with a seize of 15 metres or a pterosaur with a wingsan bigger than those of Azhdarchids if that could be possible :D
Thanks :)
paleopeter's avatar

Your welcome, scientist worked out the practical limit for a pterosaurs wingspan was 65ft (20m) and if a Sauropod exceeded 220 tons its legs would be so fat it couldn’t walk No, I disagree! 

Dontknowwhattodraw94's avatar
Wow, that is really big indeed, especially the sauropod. If I remember it right argentinosaurus' weight was 90 tons so I hope we'll find some new fossils of amphicoelias to prove how big it really was.
DinoBirdMan's avatar
anonymous's avatar
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