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T.Rex Couldn't Run?!
Topic Started: Jul 31 2017, 02:04 PM (1,339 Views)
Troy Troodon
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This and This.

I don't know if it deserves it's own topic but, what do you make of this?!
Edited by Troy Troodon, Jul 31 2017, 02:08 PM.
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kusanagi
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Tyrannosaurus limbs were birdlike but the crural index suggests T. was not a habitual runner. Other large predators like the abelisaurids and so on weren't either but nor were some small coelurosaurs like Ornitholestes. Coelophysoids were but it can't be assumed all theropods were cursorial without assuming they are paraphyletic. Some maniraptors and tyrannosauroids were but others weren't. Compsognathids, alvarezsaurs and ornithomimosaurs all were.
Edited by kusanagi, Jul 31 2017, 02:49 PM.
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Troy Troodon
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kusanagi
Jul 31 2017, 02:48 PM
Tyrannosaurus limbs were birdlike but the crural index suggests T. was not a habitual runner. Other large predators like the abelisaurids and so on weren't either but nor were some small coelurosaurs like Ornitholestes. Coelophysoids were but it can't be assumed all theropods were cursorial without assuming they are paraphyletic. Some maniraptors and tyrannosauroids were but others weren't. Compsognathids, alvarezsaurs and ornithomimosaurs all were.
So in a layman's words...
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kusanagi
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Troy Troodon
Jul 31 2017, 02:54 PM
kusanagi
Jul 31 2017, 02:48 PM
Tyrannosaurus limbs were birdlike but the crural index suggests T. was not a habitual runner. Other large predators like the abelisaurids and so on weren't either but nor were some small coelurosaurs like Ornitholestes. Coelophysoids were but it can't be assumed all theropods were cursorial without assuming they are paraphyletic. Some maniraptors and tyrannosauroids were but others weren't. Compsognathids, alvarezsaurs and ornithomimosaurs all were.
So in a layman's words...
Only a few specialised clades of dinosaurs were habitually cursorial and big tyrannosaurs were ambush predators like the rest of the "carnosaur" morphotype.
Edited by kusanagi, Jul 31 2017, 03:02 PM.
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IIGSY
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Dinosaurs sure have changed a lot since they where since discovered.
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Yiqi15
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I presume this only reiterates that tyrannosaurus was specialised to hunting ceratopsians, ankylosaurids and other slower-moving prey, rather then hadrosaurs and ornithomimids, who presumably would be preyed on by dromaeosaurs and crocodilians (full-grown specimens of the former may even have had no predators).
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Yiqi15
Jul 31 2017, 03:54 PM
I presume this only reiterates that tyrannosaurus was specialised to hunting ceratopsians, ankylosaurids and other slower-moving prey, rather then hadrosaurs and ornithomimids, who presumably would be preyed on by dromaeosaurs and crocodilians (full-grown specimens of the former may even have had no predators).
Tyrannosaurs may have specialized in slow moving armored prey, but didn't mean it couldn't opportunistically take other prey if it got the chance
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Troy Troodon
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Yiqi15
Jul 31 2017, 03:54 PM
I presume this only reiterates that tyrannosaurus was specialised to hunting ceratopsians, ankylosaurids and other slower-moving prey, rather then hadrosaurs and ornithomimids, who presumably would be preyed on by dromaeosaurs and crocodilians (full-grown specimens of the former may even have had no predators).
And unless we're talking about a reasonably numbered pack of Dakotraptors, or the really big crocodilians like Deinosuchus, I'm fairly certain hadrosaurs were more of T.rex's mainstay prey, though how it could catch them is head scratching if indeed T.rex could not run at all.
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LittleLazyLass
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Didn't I already address this in the SWHTYT thread?
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Jul 31 2017, 04:02 PM
Didn't I already address this in the SWHTYT thread?
I honestly don't recall.
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ÐK
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Full grown Tyrannosaurus not being able to run is hardly anything new or surprising, as some of the articles have iterated, John Hutchinson produced similar results years ago and palaeontologists have been in general agreement over that ever since. These new studies only further corroborate this, except for some reason it's getting treated as if they're saying T. rex were slow.
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OK, I was thinking about the theory that Daspletosaurus and Gorgosaurus preyed on different types of dinosaurs to avoid competition among one another.

Troy Troodon
 
or the really big crocodilians like Deinosuchus
I meant Deinosuchus when I said crocodilians.
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I'm fairly certain hadrosaurs were more of T.rex's mainstay prey, though how it could catch them is head scratching if indeed T.rex could not run at all.
Presumably by ambush tactics.
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Troy Troodon
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ÐK
Jul 31 2017, 04:10 PM
Full grown Tyrannosaurus not being able to run is hardly anything new or surprising, as some of the articles have iterated, John Hutchinson produced similar results years ago and palaeontologists have been in general agreement over that ever since. These new studies only further corroborate this, except for some reason it's getting treated as if they're saying T. rex were slow.
Well, weren't they?! I mean 12mph isn't exactly fast.
Edited by Troy Troodon, Jul 31 2017, 04:21 PM.
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TAXESbutNano
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Perhaps instead of chasing, they were nocturnal ambushers- approaching sleeping dinosaurs under the cover of dark and then grabbing them, much like how great white sharks might hunt tuna or how greenland sharks hunt seals.

Edit: Or, alternately, it just rapidly walked. Elephants don't seem to have much issue with reaching high speeds like that.
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Nanotyranus
Jul 31 2017, 04:23 PM
Perhaps instead of chasing, they were nocturnal ambushers- approaching sleeping dinosaurs under the cover of dark and then grabbing them, much like how great white sharks might hunt tuna or how greenland sharks hunt seals.
Nocturnal Rexes; ones that hunt their prey in their sleep... huh, interesting.
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