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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,447 Views) | |
| CyborgIguana | Nov 10 2014, 09:47 PM Post #706 |
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Tianyulong is a heterodontosaur IIRC, not a ceratopsian. |
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| Incinerox | Nov 10 2014, 10:37 PM Post #707 |
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Āeksiot Zaldrīzoti
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Tianyulong was MILLIONS of years away from even the most primitive marginocephalian. Interesting note: While theropods seem to gain filamentous integument over their evolutionary history, ornithischians seem to generally LOSE it. Think about it. Name one derived clade (like, tips of the twigs of the ornithiscian family tree) which kept the spiny quills of Tianyulong or Kulindadromeus. Poses interesting questions. |
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| BossAggron | Nov 10 2014, 10:42 PM Post #708 |
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Formerly Dilophoraptor
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could the the little spines on Ornithopods could be derived integument? |
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| Yi Qi | Nov 11 2014, 06:09 AM Post #709 |
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Hardly, they were derived osteoderms if anything. |
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| Jules | Nov 11 2014, 06:15 AM Post #710 |
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Mihi est imperare orbi universo
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That's already lost on me
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| Even | Nov 11 2014, 12:07 PM Post #711 |
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Well, there's still Martyniuk's opinion, which says that all reticulate and tuberculate scales are really feathers in various (usually arrested) development... |
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| CyborgIguana | Nov 11 2014, 01:46 PM Post #712 |
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Yes, but it's not like the exact identity of the integument would make the dinosaurs that bore them look any different. Even if those scales are derived feathers, it still doesn't change the fact that the living animal would still most likely have appeared scaly rather than feathery.
Edited by CyborgIguana, Nov 11 2014, 01:47 PM.
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| Swimming Spaghetti Monster | Nov 11 2014, 02:49 PM Post #713 |
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Did the protofeathers (the ones possessed by LUCA of both dinosaur groups, because if I understand correctly Kulindadromeus' feathers were derived from the same integument as theropod ones) have similar thermoregulation properties to derived feathers? |
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| Swimming Spaghetti Monster | Nov 11 2014, 02:50 PM Post #714 |
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EDIT: Repeated post.
Edited by Swimming Spaghetti Monster, Nov 11 2014, 03:21 PM.
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| Yi Qi | Nov 11 2014, 03:47 PM Post #715 |
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Kulindadromeus' s structures have no relation to theropod feathers, they are another kind of structure altogether. |
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| Swimming Spaghetti Monster | Nov 11 2014, 04:02 PM Post #716 |
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So Ornithopod scales are ancestral, rather than secondary? |
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| Incinerox | Nov 11 2014, 04:20 PM Post #717 |
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Āeksiot Zaldrīzoti
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Most likely, yes. |
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Nov 11 2014, 04:22 PM Post #718 |
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Is there evidence that Caenagnathoid crests are featherless or is this just something people do a lot of for some reason? |
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| DinoBear | Nov 11 2014, 04:23 PM Post #719 |
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Care to expand upon that? Haven't heard of something like that |
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| Yi Qi | Nov 11 2014, 05:40 PM Post #720 |
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The scientists on the original news article compared them and found them to be similar to Tianyulong's "fuzz", from what i heard and that one was analysed and found out to be unlike theropod feathers IIRC. |
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| 3 users reading this topic (3 Guests and 0 Anonymous) | |
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