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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,225 Views)
Six Foot Turkey
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Ulquiorra
Mar 17 2018, 08:25 PM
What were the "hands" of oviraptorids like?

Were they wing-like, like this?
Spoiler: click to toggle


Or, three separate fingers, like this?
Spoiler: click to toggle
We know from multiple coelurosaurs preserved with feathers that the wing feathers attach to the second finger as seen in the first picture.
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Incinerox
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Āeksiot Zaldrīzoti

stargatedalek
Mar 16 2018, 08:29 PM
Incinerox
Mar 16 2018, 10:19 AM
Got a less technical question for you guys:

What popular extinct animals are lacking in good skeletal restorations?
Raphus, somehow. There are some good 3D references out there but nothing in a really convenient form.
There's this, actually:
https://pachyornis.deviantart.com/art/Raphus-skeleton-516611062
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Acinonyx Jubatus
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Incinerox
Mar 20 2018, 08:05 AM
stargatedalek
Mar 16 2018, 08:29 PM
Incinerox
Mar 16 2018, 10:19 AM
Got a less technical question for you guys:

What popular extinct animals are lacking in good skeletal restorations?
Raphus, somehow. There are some good 3D references out there but nothing in a really convenient form.
There's this, actually:
https://pachyornis.deviantart.com/art/Raphus-skeleton-516611062
I'm pretty biased toward therapsids, but an Anteosaurus would be greatly appreciated. If not, Hesperornis, Coryphodon, or Pristichampsus would also be really cool.
Edited by Acinonyx Jubatus, Mar 20 2018, 01:45 PM.
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babehunter1324
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I have been doing some searching on the web about Sivatherines and I've read that the head ornamentation on them was sexual dimorphic. So did female Sivatherines lack "antlers", ossicones or both? Where they present but just reduced in size?
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Acinonyx Jubatus
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babehunter1324
Apr 13 2018, 06:48 PM
I have been doing some searching on the web about Sivatherines and I've read that the head ornamentation on them was sexual dimorphic. So did female Sivatherines lack "antlers", ossicones or both? Where they present but just reduced in size?
As I understand it, the males had more dramatic headgear, but the females were nothing to sneeze at. Take Prolibytherium. (Male on left, female on right.)

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babehunter1324
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Prolibytherium is, if I recall correctly, more distantly related to Sivatherines that Sivatherines are to modern okapis and giraffes.

Speaking of which, modern taxa doesn't help much. In okapis the females have no ossicones while in giraffes they do.
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Acinonyx Jubatus
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babehunter1324
Apr 14 2018, 02:02 AM
Prolibytherium is, if I recall correctly, more distantly related to Sivatherines that Sivatherines are to modern okapis and giraffes.

Speaking of which, modern taxa doesn't help much. In okapis the females have no ossicones while in giraffes they do.
I did not know that. Interesting.

Well, for Sivatherium itself, I can find almost no reconstructions or photos of the skull, and of the ones that do exist, even fewer actually have intact ossicones. Artwork of the living animal shows a huge array of different ossicone shapes; some curve forward, some curve back, some splay outward, some are broad, some are narrow. It's very confusing.
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Furka
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So, I've been working on reconstructions for Amargasaurus and Carnotaurus, starting from "fleshing out" the casts we have at the museum.
Any tips regarding the amount of flesh and outlines ofthe tissues I got there ?

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Six Foot Turkey
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Furka
Apr 21 2018, 05:19 AM
So, I've been working on reconstructions for Amargasaurus and Carnotaurus, starting from "fleshing out" the casts we have at the museum.
Any tips regarding the amount of flesh and outlines ofthe tissues I got there ?

Posted Image
Posted Image


Well staring with the skulls, the antorbital fenestra and lateral temporal fenestra should not be visible in a living animal. The teeth would most likely be at least partially covered in lips.The point at which the skull connects to the neck should not be so visible either.
Moving to the rest of the body, the bones of the shoulder would also not be as distinguishable.
And lastly, the ischium would be a connecting point for the major muscles of the tail. It would not be jutting out in a living animal.

Overall, these animals need to have more meat on their bones.
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54godamora
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ok not sure if this counts as a bump or not but what was the environment of china 160 mya like?
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Six Foot Turkey
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54godamora
May 5 2018, 08:22 PM
ok not sure if this counts as a bump or not but what was the environment of china 160 mya like?
Based on the species of plants found, the climate likely would have been subtropical to temperate. Many species discovered there have gliding capabilities so you would definitely expect a heavy forested area.
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54godamora
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Six Foot Turkey
May 5 2018, 08:50 PM
54godamora
May 5 2018, 08:22 PM
ok not sure if this counts as a bump or not but what was the environment of china 160 mya like?
Based on the species of plants found, the climate likely would have been subtropical to temperate. Many species discovered there have gliding capabilities so you would definitely expect a heavy forested area.

what about open spaces for creatures like say mamenchisaurus?
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Lelka
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Did Ornithischia have more flexible wrists than Saurischia?
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At0m
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What prehistoric creatures do we have the most material of and/or are studied the most?
I know Maiasaura peeblesorum is one of them due to the amount of fossils we have of them throughout their life span but are there any other organisms that come close
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stargatedalek
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At0m
May 6 2018, 02:50 PM
What prehistoric creatures do we have the most material of and/or are studied the most?
I know Maiasaura peeblesorum is one of them due to the amount of fossils we have of them throughout their life span but are there any other organisms that come close
Microraptor is probably the best known dinosaur by far, with Psittacosaurus in a clear second.

Though if you're talking post Mesozoic things get a lot more confusing.
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