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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,433 Views)
kepperbob
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- Pure Shardana -

do we have ani information of agathaumas, for example how was his skull etc.
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Luca9108
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Master of Dinosaurs

Were Geosternbergia and Pteranodon sternbergi the same animal?
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Trichechus
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Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn

kepperbob
Jan 2 2015, 10:24 AM
do we have ani information of agathaumas, for example how was his skull etc.
Not really; we only have a couple vertebrae, a hip, some ribs, and a sacrum. Agathaumas is also thought to be a nomen dubium and a possible synonym of Triceratops.

Luca: yes, they are. Geosternbergia is the new name for P. sternbergi, though it still is sometimes debated.
Edited by Trichechus, Jan 2 2015, 10:33 AM.
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Incinerox
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Āeksiot Zaldrīzoti

Luca9108
Jan 2 2015, 10:25 AM
Were Geosternbergia and Pteranodon sternbergi the same animal?
Yes.

The one species was once considered a member of the Pteranodon genus, but was then separated into Geosternbergia.

Same animal but just a new name really. Doesn't even have much of an impact on its place in the pterosaur family tree - still sister taxon to Pteranodon longiceps.
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CyborgIguana
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In fact some experts still place it within the Pteranodon genus IIRC, I'm fairly sure Witton still does for instance.
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Mathius Tyra
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Rat snake is love... Rat snake is life

Well, I don't see any difference other than crest though. :P

However, I usually use Geosternbergia because I like that name.
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Bebopgroove
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Park Designer

Just curious, but I see several reconstructions of Mammuthus columbi as having either a sparse coating of hair/fur or none at all (i.e., the African Elephant). How do we know they were like this, and not covered in fur similar to the Mastodon? Or how do we know the Mastodon even had a coat of fur?
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Taurotragus
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Of I'm correct an animal like the Columbian Mammoth wouldn't need a coat of fur in the south western USA and Mexico. And I think mastodon fur has been found.
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Incinerox
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Bebopgroove
Jan 2 2015, 04:22 PM
Just curious, but I see several reconstructions of Mammuthus columbi as having either a sparse coating of hair/fur or none at all (i.e., the African Elephant). How do we know they were like this, and not covered in fur similar to the Mastodon? Or how do we know the Mastodon even had a coat of fur?
Columbian Mammoths:

Well, quoting Wikipedia:

Quote:
 
"Hair believed to have belonged to the Columbian mammoth has been discovered in the Bechan Cave, Utah, where mammoth dung has also been found. Some of this hair is coarse, and identical to that known to belong to woolly mammoths. Since this location is so far south, it is unlikely that the hair belonged to woolly mammoths. The distribution and density of this fur on the living animal is unknown.


Aaaand there's nothing to my knowledge on Mastodon fur.
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Bill
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originally, one_piece

how likely was it for tyrannosaurs to actually unable to make such a fierce roar as people always think they do? like most modern day reptile which is pretty much silence
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CyborgIguana
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The truth is we really have no idea what most dinosaurs were capable of in terms of vocalization, but if modern birds and reptiles are anything to go by then it's probably fairly unlikely.
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Incinerox
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Bill Nguyen
Jan 2 2015, 11:13 PM
how likely was it for tyrannosaurs to actually unable to make such a fierce roar as people always think they do? like most modern day reptile which is pretty much silence


CyborgIguana
Jan 2 2015, 11:43 PM
The truth is we really have no idea what most dinosaurs were capable of in terms of vocalization, but if modern birds and reptiles are anything to go by then it's probably fairly unlikely.


I refer you to this article here:

http://dinogoss.blogspot.hk/2014/06/what-does-t-rex-say.html#more

When you read that, it's important to note that he starts going on about Aerosteon having "independently" evolved a clavicular air sac since it was still considered to be a carnosaur. The fact its now possibly a tyrannosaur with Megaraptor fits it in with other creatures WITH clavicular air sacs. And that MIGHT have an impact on possible sounds.

But as for the rest of it, it's pretty spot on. There's loads of creatures which make noises without a larynx OR a syrinx. And some LOUD noises too at that. And that's assuming dinosaurs didn't have some of their own vocal chords which may have lead up to the evolution of a syrinx in birds anyway.
Edited by Incinerox, Jan 3 2015, 03:49 AM.
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CyborgIguana
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Still, I very much doubt large theropods would've been shrieking their heads off 24/7. :P
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Incinerox
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Can you imagine a Hell Creek dawn chorus?
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Joe99
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can anyone help me find a extinct deep diving marine animal I have been wondering that if there are any extinct animals that can dive as deep as sperm whales and leatherback turtles
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