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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,385 Views) | |
| Incinerox | Jul 15 2015, 05:04 PM Post #1636 |
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Āeksiot Zaldrīzoti
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Well how big did it get eventually? D. riograndensis (originally known as Phobosuchus "back in the day") was about 1.5 times larger than the type, D. rugosus. And I think it's Rio that everyone thinks of when Deinosuchus is brought into discussion. Not Ruggie. |
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| Jannick | Jul 15 2015, 07:51 PM Post #1637 |
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Papua merdeka!
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Well, hatcheri was apparently described in 1909 already, and riograndensis only in 1954, so if hatcheri was synonymous with riograndensis, wouldn't hatcheri take priority? |
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| Zoo Tycooner FR | Jul 15 2015, 07:58 PM Post #1638 |
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#Lithopédion
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Did Hoplophoneus is the oldest Nimravidae (38.5 mils.) ?
Edited by Zoo Tycooner FR, Jul 15 2015, 07:58 PM.
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| Incinerox | Jul 15 2015, 10:27 PM Post #1639 |
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Āeksiot Zaldrīzoti
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D. hatcheri is synonymous with the type species, D. rugosus, not D. riograndensis, which was discovered in 1858. At the time they were teeth assigned to pliosaur genus Polyptychodon as P. rugosus. Deinosuchus hatcheri happened when scutes originally assigned to Euoplocephalus, associated with crocodilian dorsal and hip material, were redescribed in 1909 as you stated. Since that reclassification, they had to pull out the holotype teeth from Polyptychodon, leaving Deinosuchus as the only valid genus for the new giant crocodilian. But because the species name "rugosus" was coined first, that was still valid. Hence why we have Deinosuchus rugosus. The Deinosuchus riograndensis we all know and love didn't show up until much later in the 40s, where it was named Phobosuchus riograndensis. This is probably what ZT2 developers wanted to make, but didn't get the names right. |
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| BossMan, Jake | Jul 16 2015, 12:27 AM Post #1640 |
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Son of God
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These two questions regard our ol' friend T-Rex. First off trex had a height of about 13-14 feet high. How did the idea come up for a Rex being 20 feet high? Also as we know dinosaurs cakes in species like S.Stenops and S.Armatus and vice versa. We're there any other species of tyrannosaurus? I remember hearing about a species know as T-Imperator but I just want to be sure. |
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Jul 16 2015, 12:43 AM Post #1641 |
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★
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Posture is my guess. Tyrannosaurus given diagonal (incorrect) posture are far taller than proper horizontally set animals. ![]()
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| Paleop | Jul 16 2015, 12:49 AM Post #1642 |
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Paleopterix
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t rex was 13ft at the hips (high average) so the idea of 20ft height stems from either the outdated upright stance or from media portraying it larger. an unreleased paper suggested that southern specimens or t rex could be reassigned to a new genus Alamotyrannus Brinklani. to me it seems that a Tyrannosaurus Brinklani is more likely, but I'm no expert. hope this helps Edit: ed by Aladeen
Edited by Paleop, Jul 16 2015, 12:51 AM.
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| Urufu | Jul 16 2015, 06:12 AM Post #1643 |
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In the Internet circulate rumors from a Species named Tyrannosaurus imperator, a Tyrannosaur, with a length about 20 meters. The guess is based on an unusually large pelvic bone, but these particular forms are already known from other tyrannosaurs, whereby Tyrannosaurus Imperator must be much smaller. His Length probably was 14 meters. Tyrannosaurus Imperator is not recognized as a separate species. Informations from the German Website urzeitwelt.wordpress.com, translated by me. For more Informations about the Fossil you can look here >>https://en.wikipedia.org/wiki/Specimens_of_Tyrannosaurus<< you can find the Tyrannosaurus Imperator under the section Peck's Rex Edited by Urufu, Jul 16 2015, 06:17 AM.
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| Helryx | Jul 16 2015, 06:47 AM Post #1644 |
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bean
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What is the advantage of having a set of rigid and slender jaws actually? I know it's an adaptation of hunting long, slender-necked herbivore (Therizinosaurus, Deinocheirus & other sauropods) but wouldn't a T.rex like jaw is better? You know since it's a lot more more powerful and whatnot. Furthermore, is Tarbosaurus's bite force really enough to bring down sauropods/therizinosaurs/ornithomimosaurs easily? If it is, then I think the sacrifice of a more powerful set of jaws and a robust body might be for an increase in agility because the dinosaur wouldn't need a stronger/heavier jaw to take down it's prey. So, all in all, I just want to know the estimated bite force for Tarbosaurus and how does it fare against it's prey. Also, is it enough to take down prey such as Saurolophus or a juvenile Tarchia? |
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| Incinerox | Jul 16 2015, 11:39 AM Post #1645 |
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Āeksiot Zaldrīzoti
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There was probably no inherent advantage to it. If you look at older tyrannosaurids, going back through the tyrannosaurines, looking at albertosaurines and alioramini as well, it becomes apparent that tarbosaurus actually had the "normal" tyrannosaurid skull design. American tyrannosaurids over developed their skull strength over time instead (interesting note here: the guys that tested the skull mechanics between Tarbo and Rex have shown that Tarbo's skull was built more like Alioramus and co., meaning it's possible there's a shared ancestry between them rather than between Tarbo and Rex). And I put that down to coexisting with and preying on large ceratopsians, which seem to be lacking in Asia. They're the sort of prey which you want to be able to kill, or at least cripple, with one quick,, bone shattering bite. Also, bear this in mind. Allosaurus, a notorious sauropod hunter, was neither robust, nor did it have a strong bite. In fact, for a 9m, multi-ton animal, its bite was pathetic. Current calculations suggest a bite force no more than that of an average lion. That said, jaw muscles weren't really that much of a factor in the equation. They just opened their jaws really wide, and just swung their heads down on prey like a butcher's meat cleaver. While I don't think Tarbosaurus used that kind of method specifically, it certainly wasn't underpowered. While it wasn't breaking ceratopsian necks, it was certainly enough to be able to snap the slim necks of most of its contemporaries. It's thought that making the jaws more rigid compensated for the fact that it didn't have the flared jugals and supersized jaw muscles of T. rex to clamp down on struggling prey. It probably didn't make much difference in the case of Saurolophus, and being an ankylosaurid, Tarchia was probably quite safe regardless. Actually, have the paper: http://www.app.pan.pl/archive/published/app48/app48-161.pdf Edited by Incinerox, Jul 16 2015, 11:41 AM.
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| Helryx | Jul 16 2015, 09:16 PM Post #1646 |
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bean
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Aww, thanks so much for the paper! ![]() Edited by Helryx, Jul 16 2015, 11:44 PM.
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| DinoBear | Jul 16 2015, 10:11 PM Post #1647 |
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Speaking of gapes, has any paper been published regarding the gape of carcharodontosaurids? Also, do albertosaurines have weaker estimated bite forces compared to other similarly sized tyrannosaurids? Edited by DinoBear, Jul 16 2015, 10:15 PM.
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| BossMan, Jake | Jul 16 2015, 10:23 PM Post #1648 |
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Son of God
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So recently I have been looking at some dinosaur scales to see if any dinosaurs were found to be bigger or smaller etc. and in every theropod size chart they list charcharodontosaurus as bigger than giganotosaurus. Is this true or was something screwed up?
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| Denomon3144 | Jul 16 2015, 10:44 PM Post #1649 |
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Pick a god and pray!
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Why are birds' hips more similar to that of ornithischians than saurischians? Was there some kind of evolutionary advantage for them?
Edited by Denomon3144, Jul 16 2015, 10:48 PM.
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| Helryx | Jul 16 2015, 11:44 PM Post #1650 |
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bean
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One more thing, (so sorry if you're annoyed by this) is it possible that almost all tyrannosaurids had a septic bite (well,at least the later ones)? |
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