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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,416 Views)
Incinerox
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Āeksiot Zaldrīzoti

No.

Posted Image

Dinosaur ears fit snugly between the quadratojugal/quadrate and the muscle that opens the lower jaw (which stretches from the rear of the surangular to the paretial/squamosal).
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Acinonyx Jubatus
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Incinerox
Mar 4 2015, 10:54 PM
No.

Posted Image

Dinosaur ears fit snugly between the quadratojugal/quadrate and the muscle that opens the lower jaw (which stretches from the rear of the surangular to the paretial/squamosal).
Ah. I see. Thank you, I was always confused by this.
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Paleop
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Paleopterix

1.could some dinosaurs have had bioluminescence ?
2.could hadrosaurs box like deer?
3.what is theorized to be the fastest dinosaur?how fast?

thanks for answers :)
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Acinonyx Jubatus
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Paleop
Mar 7 2015, 12:36 PM
1.could some dinosaurs have had bioluminescence ?
2.could hadrosaurs box like deer?
3.what is theorized to be the fastest dinosaur?how fast?

thanks for answers :)
1. There is no biological reason why they couldn't have been, to my knowledge. However, as there are NO other bioluminescent tetrapods that we know of, the likelihood is pretty much nil.
2. I don't see why they couldn't- Hadrosaurs are known for being able to rear up on their hind legs, and their forelegs are very much like hooves.
3. Carnotaurus. All the sources I've seen say 40kph, but this seems way too small for an animal so adapted for running... I'm guessing more like 80 or 100 kph, but I'm no expert, so DO NOT take my word for it.
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Incinerox
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Āeksiot Zaldrīzoti

It wasn't 40kph. Carnotaurus was thought to run at 40-50 miles per hour, IIRC.
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Acinonyx Jubatus
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Incinerox
Mar 7 2015, 01:10 PM
It wasn't 40kph. Carnotaurus was thought to run at 40-50 miles per hour, IIRC.
That makes more sense. :P The only source I could find said 40 kilometers. So, about 65 to 80 kph.
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Jules
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Mihi est imperare orbi universo

Holy crap.
That makes it around 70-80 kph.
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Taurotragus
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What did it need that speed for?
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CyborgIguana
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My best guess would be that abelisaurids were pursuit predators rather than ambush predators like most other theropods appear to have been.
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Mathius Tyra
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Rat snake is love... Rat snake is life

Perhaps it hunts like cheetah? Going after small and swift preys that is even slower than itself...

I could see something like Hypsilophodont or similar ornithopods in its environment being its main prey....
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Incinerox
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Āeksiot Zaldrīzoti

It wasn't hunting big animals, I can tell ye that much. Small head, small teeth, weak jaws, wasn't particularly large etc. But we know it was well adapted to allosaurus-like axeblows with its head. So there's that. And we also know that, while it was very good in a straight line, it probably had atrocious cornering.

Annoyingly, we don't even know what it lived with. Carnotaurus is the only reasonably known dinosaur from its formation. And even then, everything we know about Carnotaurus, and I mean *everything*, including its rough, wrinkly skin, is known from one specimen.
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Taurotragus
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@Mathius: Your theory sounds right. I even remember seeing some art that depicts that.
Edited by Taurotragus, Mar 7 2015, 02:45 PM.
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Admiral General Aladeen
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Is there any reason as to why it evolved to be so bad at turning? Cheetahs are particularly good at turning when sprinting because of their long tails.
Edited by Admiral General Aladeen, Mar 7 2015, 02:49 PM.
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Taurotragus
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I'm not sure about that. That's a very good question.

Also here's the art: http://chrismasna.deviantart.com/art/Hello-I-am-the-Devil-336536001
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Incinerox
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Āeksiot Zaldrīzoti

Admiral General Aladeen
Mar 7 2015, 02:46 PM
Is there any reason as to why it evolved to be so bad at turning? Cheetahs are particularly good at turning when sprinting because of their long tails.


To quote Wikipedia:

Wikipedia
 
In the tail vertebrae of Carnotaurus the caudal ribs did not protrude horizontally ("T-shaped"), but were angled against the vertical axis of the vertebrae, forming a "V". This would have provided additional space for a caudofemoralis muscle larger than in any other theropod—the muscle mass was calculated at 111 to 137 kilograms (245 to 302 lb) per leg. Therefore, Carnotaurus could have been one of the fastest large theropods. While the caudofemoralis muscle was enlarged, the epaxial muscles situated above the caudal ribs would have been proportionally smaller. These muscles, called the longissimus and spinalis muscle, were responsible for tail movement and stability. To maintain tail stability in spite of reduction of these muscles, the caudal ribs bear forward projecting processes interlocking the vertebrae with each other and with the pelvis, stiffening the tail. As a consequence, the ability to make tight turns would have been diminished, because the hip and tail had to be turned simultaneously, unlike in other theropods.
Edited by Incinerox, Mar 7 2015, 03:19 PM.
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