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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,467 Views)
CyborgIguana
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stargatedalek
Jun 17 2014, 12:06 PM
CyborgIguana
Jun 17 2014, 11:42 AM
stargatedalek
Jun 15 2014, 07:29 PM
I still think its plausible for a powered flight exothermic animal besides insects to exist

I just don't think pterosaurs were that animal

I think if pterosaurs were endothermic, that would point towards the ancestors of dinosaurs being endothermic as well
That may not necessarily be the case. I think endothermy in pterosaurs probably evolved simultaneously with powered flight. The same seems to be true of birds. A taxon's metabolism isn't necessarily universal. :P
Wouldn't that mean no dinosaurs were endothermic? xD
When did I say that? :P
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stargatedalek
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I'm not slow! That's just my moe!

before you ninja'd me earlier when you restated what you had meant xD

what I meant was you had said endothermy appeared to have evolved alongside powered flight in pterosaurs, and you said the same appeared true of birds
implying that terrestrial dinosaurs were not endothermic

you later restated that to less active dinosaurs, but I was ninja'd while I posted that so I was a few posts behind
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CyborgIguana
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That's not what I intended to imply, sorry. :P
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stargatedalek
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I'm not slow! That's just my moe!

thats fine
it was my bad for not going back to check if anyone had posted while I had
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SamtheMan
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Hi everyone. I was looking up some information on dinosaurs when this question occurred to me: are there any official terms for young, adult male, and adult female dinosaurs? Several places will refer to an adult male as a bull while others will refer to young as hatchlings. Do we know what the official terms are or can they be whichever seems more correct (albeit still being reasonable) by analogy? Also, would these terms differ between different groups of dinosaurs such as theropods and sauropods, etc.? Thanks for the time and I appreciate any responses!
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Similis
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The easiest way is:

Hatchling -> Young -> Juvenile -> Subadult -> Adult -> Old

Depending on perspective, some herbivores like ornithopods can be called after bovids (calf, cow, bull) while I personally like to call ceratopsians after pigs - sow and boar. It's a bit messy, so it's best to cling to the usual combo I wrote above :P
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Okeanos
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Plus, most modern baby theropods are called chicks, so chicks could be used for extinct theropods too :P
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BossAggron
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Formerly Dilophoraptor

What is the Supportive and Unsupportive arguments for Feathers and Quills (and possibly Pycnofibers) being Homologous structures?
Edited by BossAggron, Jun 30 2014, 03:04 AM.
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kepperbob
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- Pure Shardana -

Anybody can tell me the difference between parasaurolphus tubicen and parasaurolophus walkeri please?
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BossAggron
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Formerly Dilophoraptor

kepperbob
Jun 30 2014, 05:58 AM
Anybody can tell me the difference between parasaurolphus tubicen and parasaurolophus walkeri please?
walkeri is from Alberta where tubicen hails from New Mexico, tubicen is also known for more complex airways, and is the largest of the three species.
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CyborgIguana
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P. tubicen also has a slightly longer crest IIRC.
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BossAggron
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Formerly Dilophoraptor

CyborgIguana
Jun 30 2014, 07:04 AM
P. tubicen also has a slightly longer crest IIRC.
I think it's restored either way from what i've seen.
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stargatedalek
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I'm not slow! That's just my moe!

Dilophoraptor
Jun 30 2014, 03:03 AM
What is the Supportive and Unsupportive arguments for Feathers and Quills (and possibly Pycnofibers) being Homologous structures?
I don't recall anything concrete on that regard
but it does seem like a safe bet there is a common ancestor for all
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SamtheMan
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Thank you MrGorsh and Okeanos for those responses, its appreciated. Pig terms do seem to fit the ceratopsians quite well and calling baby theropods chicks feels right and makes sense (especially with modern relatives).

While Parasaurolophus was being mentioned, I did some research on its Asian relative Charonosaurus and was wondering if anyone knows for certain what its length and weight are? I'm asking because its size seems to vary from source to source, some claim a length of 10 meters while others say it was about 13 meters.
Edited by SamtheMan, Jul 1 2014, 04:15 AM.
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Mathius Tyra
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Rat snake is love... Rat snake is life

Charonosaurus is larger than Para, I guess the 13 metres is more correct.
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