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Southern Super Raptor!

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  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    Just read from your other thread - Very strange looking indeed. the small arms would lead me to believe that he was probably more built and muscular than the similarly sized Utahraptor, which perhaps meant he could have scavanged at times.. Just a hypothesis though.


  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean


    Indeed. The arms wouldn't be much use at grappling prey as appears to be a common trait among the dromaeosaurs. Also, the famous claw isn't as pronounced as in many other dromaeosaurs, making it a less effective killing tool. The long snout may have been used for burrowing deep into old carcasses.
    Again, purely hypothesizing though.


  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    Did it have a retractable claw on the foot? I don't see a mention of it, but the picture suggests it did. Argentina seems to be weird in the sense that the dinosaurs there were extremely large.. Argentinasaurus, Giganotosaurus and now this guy.


  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean


    At five meters long with a sickle-shaped claw, it was an amazing predator.

    So according to him it did have the trademark sickle claw. The image depicts the claw, albeit comparatively small. Perhaps it was a vestigial thing, sort of on the way out as this particular line of dromaeosaur evolved toward a scavenging lifestyle?

    Comparitively speaking the southern continents in general had huge dinosaurs during the Cretaceous. Where South America had Argentinosaurus and Giganotosaurus, around the same time Africa had Paralititan, Carcharodontosaurus and Spinosaurus!


  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    True enough.


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  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean


    Also, I forgot to mention that it (Austroraptor cabazai) had small, fairly conical shaped teeth. These could well have been more suited to gnawing on bones rather than slicing flesh. Paul Sereno himself pointed out this attribute, along with having tiny arms when stating that the abelisaur Carnotaurus was most likely a scavenger.
    It would seem Carnotaurus and Austroraptor have a lot in common:
    - small arms
    - small not particularly sharp teeth
    - stocky robust build

    Weird how Sereno calls Austroraptor an "amazing predator" while to him Carnotasurus is a scavenger.

    Carnotaurus:
    carnotaurus.jpg
    Austroraptor:
    081217-new-raptor-missions_big.jpg

    I see similarities.


  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    I agree that there are similarties, but as a raptor - you would assume that he was a quick runner - which is really only beneficial to predators when attacking, rather than scavaging.

    For me - I think he was a pick and choose sort of guy. Sort in between evolution from a raptor to a large carnivore, but not there yet. He still had the characteristics of a raptor, with speed and intelligence favouring his attacking of prey - but also, large size, which might allow him to bully off smaller predators from their freshly killed meal.

    Not everything is black and white, and when we find fossils - it would be perfectly OK to assume that an animal could be still at an evolving stage from one species to another.

    Thoughts?


  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean


    Certainly. Austroraptor ceratainly appears to be on it's way down the path of scavenger. Of course I don't buy into the concept of any carnivorous dinosaur to be '100% scavenger'.
    Since it lived approximately 70MYA (pretty close to the end of the reign of the dinosaurs) we aren't very likely to discover it's decedents and compare them to see if they had evolved more scavenger-like traits. Our best bet to properly study it's evolution would be to look for it's ancestors and see how it compares. Exactly when these traits first appeared in the dromaeosaur lineage is anyone's guess.

    One thing it does show is the diversity of the dromaeosaurs as a group. On one end of the spectrum we have this big and bulky Austroraptor, while at the other end we have the tiny and graceful Microraptor gui.
    microraptor2b_c.jpg


  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    <3 Microraptor.


  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean




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  • Registered Users Posts: 30,747 ✭✭✭✭ Galvasean


    austro_head_2.jpg

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    610x.jpg

    ac04.jpg

    610x.jpg


  • Closed Accounts Posts: 337 ✭✭ 'Ol Jack Chance


    The size of that thing! It defo makes the velociraptor look like a chicken. I wonder if they hunted in packs...

    That kid in the last picture reminds me of the kid at the start of Jurassic Park :D


  • Closed Accounts Posts: 20,761 ✭✭✭✭ dlofnep


    Oh gawd, he's awesome!


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