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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,288 Views) | |
| Paleodude | May 22 2016, 08:44 PM Post #3091 |
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ex-Krampus
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Last time I checked we only had the lower jaw so it isn't entirely definitive (at least from what I could find) however the shape of the jaw is very similar to that of oviraptorids like Citipati that we do have evidence of preening teeth similar to the ones in Planet Dinosaur. Here's some pretty good skeletals of both the skulls for comparison, notice the shape of the lower jaws. Spoiler: click to toggle
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| Mathius Tyra | May 23 2016, 11:48 AM Post #3092 |
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Rat snake is love... Rat snake is life
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Are these preening teeth a set of modified tooth or just something that is analogue in appearance to tooth? |
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| Paleodude | May 23 2016, 12:25 PM Post #3093 |
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ex-Krampus
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Analogous bony projections from the palate, true teeth were lost earlier in oviraptorid evolution in favor of a beak; Source: https://books.google.com/books?id=KZTR5TIo9cEC&pg=PT324&dq=oviraptor+palatal&hl=en&sa=X&ei=MlFcVNWDAfWKsQS2_4CIDw#v=onepage&q=oviraptor%20palatal&f=false |
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| Incinerox | May 23 2016, 03:38 PM Post #3094 |
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Āeksiot Zaldrīzoti
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Honestly, the whole bit about them being used for preening is news to me. Why was it necessary? |
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| heliosphoros | May 23 2016, 04:49 PM Post #3095 |
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Birds preen fine without weird teeth. The projections still baffle most people, AFAIK. The old "oviraptors are ovivores" idea already stretched their use, but now that we know that they were herbivores... Maybe they were used like muntac deer fangs? |
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| stargatedalek | May 23 2016, 05:39 PM Post #3096 |
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I'm not slow! That's just my moe!
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Remember that a birds beak, even a very rounded one like a parrot, still ends in a distinctive hook or point. Oviraptorosaur beaks however were rounded at the tip, almost like a pufferfish, and so may not have sufficed for preening. |
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| heliosphoros | May 23 2016, 06:37 PM Post #3097 |
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I've seen plenty of oviraptorosaur jaw ends and they seem hooked to me. |
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| Incinerox | May 23 2016, 08:09 PM Post #3098 |
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Āeksiot Zaldrīzoti
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The bone cores of oviraptorosaur jaws does not reflect the possible extent of keratin in life. Otherwise a large number physically could not close their mouths properly. |
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| Paleodude | May 23 2016, 08:51 PM Post #3099 |
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ex-Krampus
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Sorry to cause a ruckus, just called them preening teeth as that what Star said they were used for and I just like the name. As for being used like Muntajac, considering how far back the projections were in the mouth they were most likely covered mostly in gum and probably wouldn't be very visible. If anything I'm guessing they helped keep large food down. |
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| Paleop | May 23 2016, 09:23 PM Post #3100 |
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Paleopterix
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how large could a theropod be before it couldn't jump (assuming that ability was lost with size) |
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| CyborgIguana | May 23 2016, 10:01 PM Post #3101 |
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I assume it'd have more to do with proportions than size (though granted proportions tend to change with size).
Edited by CyborgIguana, May 23 2016, 10:06 PM.
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| BossMan, Jake | May 24 2016, 12:14 AM Post #3102 |
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Son of God
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How old could a large theropod like T-Rex get? I've heard they died young at ages like 22, to maxing out at 45 years Not just looking for Rexy in particular but really any large theropod Edited by BossMan, Jake, May 24 2016, 12:14 AM.
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| Incinerox | May 24 2016, 06:10 AM Post #3103 |
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Āeksiot Zaldrīzoti
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Because T. rex is our best documented large theropod save for Allosaurus, it's the best one to use to answer said question. Sue died at 26 years 9 months. Scotty was pushing 30. So I'd say 30 was OLD for a large theropod. |
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| BossMan, Jake | May 25 2016, 02:30 PM Post #3104 |
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Son of God
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Questions about Leptoceratops 1. Is it possible that for short amounts of time they could walk bipedal? 2. I had an old book and it stated that leptoceratops fossils are known from Australia. Was this a misidentification or complete inaccuracy? |
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| babehunter1324 | May 25 2016, 02:56 PM Post #3105 |
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1. Judging by Scott Hartman, sketal, quite unlikely. ![]() 2. While as far as I know the remains that were found in Australia might turn out to be from a Ceratopsid, it certainly wouldn't be Leptoceratops. |
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