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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,248 Views)
Incinerox
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Āeksiot Zaldrīzoti

Didn't a Hesperosaurus specimen actually have a patch of fossilised keratin on on one of its plates?
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Furka
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Working on a ZT2 thing, would this be a good list of species representing fauna from the Mammoth Steppe of Europe ?

- Woolly Mammoth
- Woolly Rhinoceros
- Bison
- Horse
- Reindeer
- Irish Elk
- Saiga
- Musk Ox
- Grey Wolf
- Cave Hyaena
- Cave Lion
- Cabe Bear (?)
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CeruleanJay
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Incinerox
Jan 18 2017, 10:38 AM
Didn't a Hesperosaurus specimen actually have a patch of fossilised keratin on on one of its plates?
Yo, I think I know what you're talking about. Just mentioned this in Ecology class. Here's the Princeton database article: http://dataspace.princeton.edu/jspui/handle/88435/dsp01n870zq99d
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magpiealamode
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No good hero is a one-trick phony.

Furka--depends on what exactly you mean by mammoth steppe of Europe. What exact locality and time? If it's not the latest Pleistocene, you might want to include Elasmotherium Meanwhile the cave bear seems to have avoided open plains.
I have literally no idea what you're doing so if you're not going with the specifics, you will need a much larger list.
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Furka
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Western Europe was the setting I was aiming for (something like the artwork of Mauricio Antòn).
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magpiealamode
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No good hero is a one-trick phony.

I don't think Elasmotherium ranged that far West, so scratch that. Apparently there were brown bears in Spain during the Ice Age so maybe throw those in? You'll definitely want to include the aurochs by the way, and possibly the narrow-nosed rhinoceros and Homotherium if you're not going for the end of the Pleistocene.
Love Anton's work, by the way. His blog is my home page.
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Furka
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Weren't Aurochs forest dwelling animals rather than steppe ?
Although I guess I could make a "transitional" environment with patches of taiga and animals like moose.
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Incinerox
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amphicyon
Feb 5 2017, 06:26 PM
Apparently there were brown bears in Spain during the Ice Age so maybe throw those in?
They're still there.
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magpiealamode
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No good hero is a one-trick phony.

Incinerox
Feb 6 2017, 03:40 AM
amphicyon
Feb 5 2017, 06:26 PM
Apparently there were brown bears in Spain during the Ice Age so maybe throw those in?
They're still there.
They are, what I meant by that was brown bears were absent from most of Europe during the Ice Age but persisted in Spain and a few other areas. The picture Furka posted depicts the Pleistocene fauna of Spain so I thought he might be aiming for that area.

From what I've read, Aurochs occupied a wide range of habitats, but in recent times were mostly found in forests since the mammoth steppe had all but disappeared. And if you do include the taiga, might as well include in cave bears.
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BossMan, Jake
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Son of God

Posted Image
Aurochs range map in case anybody needed to see
Edited by BossMan, Jake, Feb 7 2017, 04:40 PM.
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PrimevalBrony
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Youtuber. Combat robotics fan

Here's a weird question that may or may not be possible to answer: since birds have sex chromosomes (Z and W for those who don't know, homozygous ZZ are male and heterozygous ZW are female), I was wondering if these same chromosomes were present in Maniraptoriformes or maybe even all of Dinosauria?
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Posted Image Flish
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PrimevalBrony
Feb 8 2017, 02:01 PM
Here's a weird question that may or may not be possible to answer: since birds have sex chromosomes (Z and W for those who don't know, homozygous ZZ are male and heterozygous ZW are female), I was wondering if these same chromosomes were present in Maniraptoriformes or maybe even all of Dinosauria?
The short answer is we simply don't know. It evolved at some point after the Crocodilian split is all we can tell you. For all we know, basically all of Archosauria more derived than a crocodile had true sex chromosomes, but it could also be something that appeared in Avialae. We don't really have a way of knowing considering we don't exactly have usable genetic material from any extinct archosaurs that could answer this question.
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TheNotFakeDK
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200% Authentic

If I was to make a guess, I wonder if it may have developed when coelurosaurs began brooding their nests, as opposed to burying them in mounds of soil seen in other dinosaurs, which could have perhaps still relied on temperature-dependent sex determination like crocodilians?
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HENDRIX
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-retired-

TheNotFakeDK
Feb 8 2017, 05:50 PM
If I was to make a guess, I wonder if it may have developed when coelurosaurs began brooding their nests, as opposed to burying them in mounds of soil seen in other dinosaurs, which could have perhaps still relied on temperature-dependent sex determination like crocodilians?
It should have been there before, but brooding behavior would have indeed added selection pressure in favor of species with gonosomes.
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TheToastinator
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A piece of toast and a terminator.

Do we have any evidence of Ceratosaurus being at least semi-aquatic? I've read that they possibly could've been good swimmers, but is there any proof?
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