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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,295 Views) | |
| Ulquiorra | Apr 27 2016, 04:24 PM Post #2986 |
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Was there even any difference between Allosaurus and Saurophaganax, other than size? Because from what I've read, there isn't. |
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| CyborgIguana | Apr 27 2016, 04:35 PM Post #2987 |
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Not really AFAIK. The fact that Big Al is still considered an A. fragilis by many should speak for itself as to how messed up the taxonomy of the genus is. |
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| Paleop | Apr 27 2016, 05:04 PM Post #2988 |
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Paleopterix
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is it likely that Dryosaurus would have had feathers? personally I kinda doubt it assuming that Dryos are derived ornithischians edit: what about pachyrhinosaurus? Edited by Paleop, Apr 27 2016, 05:08 PM.
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| DinoBear | Apr 27 2016, 05:25 PM Post #2989 |
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I believe time plays a part, IIRC Saurophaganax showed up later than Allosaurus fragilis. Personally I think it is in that gray area where it becomes kind of difficult to tell where one genus ends and another starts. |
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| CyborgIguana | Apr 27 2016, 05:29 PM Post #2990 |
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The conservative assumption for both would be no, since they have close relatives that we know to be scaly. That said, it's not impossible that some derived ornithischians could've re-evolved soft integument under specific conditions. |
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| BossMan, Jake | Apr 27 2016, 11:15 PM Post #2991 |
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Son of God
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Dang it! Now I gotta re write my book now knowing that Dryosaurus was probably not feathered
Edited by BossMan, Jake, Apr 27 2016, 11:34 PM.
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| Acinonyx Jubatus | Apr 27 2016, 11:34 PM Post #2992 |
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I AM THE UNSHRINKWRAPPER!
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They weren't that derived. Dryosaurids were very basal Iguanodontians, sister-taxon to Ankylopollexia and only a node or two away from Thescelosaurus and Muttaburrasaurus, both of which could easily have been feathered. |
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| Incinerox | Apr 28 2016, 06:16 AM Post #2993 |
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Āeksiot Zaldrīzoti
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I wouldnt say EASILY, but the point remains all the same. It's all very much a gray area there. |
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| heliosphoros | Apr 28 2016, 08:27 AM Post #2994 |
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As I was doing research on Paracrax I found that it's relative, Bathornis, might have favoured wetland or aquatic environments. We're talking of some +8 species within the genus, which means that the Eocene to Miocene had a north american semi-aquatic flightless predatory bird guild. Spino-bird when? |
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| BossMan, Jake | Apr 28 2016, 10:43 AM Post #2995 |
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Son of God
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I've seen quite a few ceratosaurus restorations recently and I'm confused a bit. What was the animal really like (to the best of our knowledge) Large and bulky like this? ![]() Or sleek and more agile like say this for example?
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| DinoBear | Apr 28 2016, 10:47 AM Post #2996 |
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One difference is the top is based on Ceratosaurus dentisulcatus while the bottom looks like it is C. nasicronis. Now, dentisulcatus is the only known adult Ceratosaurus (or at least the only adult with decent remains) and chances are it is just a fully grown nasicornis. As for which is accurate, depends on the life stage. Adult Ceratosaurus had very deep torsos like in the top picture, while younger ones where a bit slimmer. |
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| BossMan, Jake | Apr 28 2016, 10:55 AM Post #2997 |
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Son of God
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So you're telling me many C.nasicronis found have been juvenile?
Edited by BossMan, Jake, Apr 28 2016, 10:57 AM.
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| babehunter1324 | Apr 28 2016, 11:39 AM Post #2998 |
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Subadults or young adults. Quite a lot of species of Theropods tend to get more and more robust as they grew, also they had negative allometric growth on their limbs, so as they become longer and more robust their limbs wouldn't change much in size or girth. |
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| Denomon3144 | Apr 28 2016, 01:48 PM Post #2999 |
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Pick a god and pray!
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How likely is it that that Alioramus species lived in the Bayan Mandahu and/or Djadochta Formations? |
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| BossMan, Jake | Apr 28 2016, 02:04 PM Post #3000 |
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Son of God
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Djadochta and Bayan Mandahu formations are dated at about 75-71 mya, consiquently later then Alioramus's time range of 70 mya, but I see no reason not to think that Alioramus as a genus could be a bit older then that
Edited by BossMan, Jake, Apr 28 2016, 02:34 PM.
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