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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,373 Views)
BossMan, Jake
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Son of God

This is a question that I understand sounds a bit stupid but did plesiosaurs go on land at all or were they exclusively refined to the oceans?
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CyborgIguana
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Chances are they were almost exclusively aquatic since they gave birth to live young (which wouldn't give them much reason to venture onto land).
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Denomon3144
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Pick a god and pray!

Does anyone know what biome the Quercy Phosphorites Formation would best be represented by, including the Radical Remake ones?
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Paleodude
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ex-Krampus

The Beeg One
Aug 10 2015, 07:19 PM
Does anyone know what biome the Quercy Phosphorites Formation would best be represented by, including the Radical Remake ones?
In my opinion the swampy environment of the Paleogene would best be represented with Paulstrine Wetlands, Tropical Rainforest, and Temperate Forest due to the large ammount of deciduous plants that began to flourish. However there were areas of encroaching Temperate Grassland that popped up. It just all depends on what animal your deciding for.
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Incinerox
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Āeksiot Zaldrīzoti

I can't believe I even found a paper on it.

It was definitely tropical, likely tropical woodland or savannah. But as the Eocene came to a close, it started to dry up, and when the Oligocene rolled in, it was a far more arid Mediterranean environment, more like how it is now in southern Spain.
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Paleop
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Paleopterix

is it likely that the frill holes (I think there called fenestra) in chasmosaurines were visible in life (like in the depiction below) or were they submerged in flesh?

Posted Image
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MightyFan217
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OH YESSS!

So I've been bothered with this question for days now. Combined with their unusual traits they already have, and how Dinosaur Revolution called them as such, is there even the REMOTE possibility of the idea that Troodon actually survived the K-Pg Extinction event?
Edited by MightyFan217, Aug 11 2015, 09:37 PM.
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Komodo
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Varanus komodoensis

I don't know if Troodon was still a common dinosaur during the end of the Cretaceous (it's mostly known for remains from the Campanian, although there are Maastrichtian records). Even if Troodon as a genus was already extinct or declining at the end of the Maastrichtian, I think troodontids could be one of the last dinosaur families to die out, as they are the closest to avialans and had many physical and biological traits useful for their survival (small size, big eyes, possibly nocturnal lifestyle, relatively high intelligence and omnivore diet) that would allow them to live more time than bigger dinosaurs. I don't know the duration of the K-T extinction event, but it could have been very short for a mass extinction. I think there is a possibility some bird-like dinosaurs could have survived past the end of the Cretaceous but I find unlikely that they continued to roam Earth for much longer.
Edited by Komodo, Aug 11 2015, 09:49 PM.
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MightyFan217
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OH YESSS!

Komodo
Aug 11 2015, 09:48 PM
I don't know if Troodon was still a common dinosaur during the end of the Cretaceous (it's mostly known for remains from the Campanian, although there are Maastrichtian records). Even if Troodon as a genus was already extinct or declining at the end of the Maastrichtian, I think troodontids could be one of the last dinosaur families to die out, as they are the closest to avialans and had many physical and biological traits useful for their survival (small size, big eyes, possibly nocturnal lifestyle, relatively high intelligence and omnivore diet) that would allow them to live more time than bigger dinosaurs. I don't know the duration of the K-T extinction event, but it could have been very short for a mass extinction. I think there is a possibility some bird-like dinosaurs could have survived past the end of the Cretaceous but I find unlikely that they continued to roam Earth for much longer.
Long enough for Troodon to, though very, VERY unlikely, be the ancestor of Owls?
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CyborgIguana
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That's pretty much out of the question. We can say with certainty that Troodon is DEFINITELY not the ancestor of owls (any similarities are the result of convergent evolution).
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Komodo
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Varanus komodoensis

If we look to current cladistics, Troodontids aren't direct ancestors of any living kind of birds, owls included despite their convergent evolutive traits. Troodontids are the last dinosaur family to diverge from the evolutive branch leading to Avialae and modern birds. Birds and Troodon share the most recent common ancestor between Avialae and non-avian dinosaurs, that diverged somewhere in the Middle Jurassic.

Greetings!
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Luca9108
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Master of Dinosaurs

What were the main reasons for the Permian mass extinction?
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CyborgIguana
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That's what makes the worst mass extinction in Earth's history even scarier: we don't even know exactly what caused it. We just know that over 90% of life on Earth was affected by it.
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Luca9108
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Master of Dinosaurs

CyborgIguana
Aug 13 2015, 11:58 AM
That's what makes the worst mass extinction in Earth's history even scarier: we don't even know exactly what caused it. We just know that over 90% of life on Earth was affected by it.
Thanks for answer. BTW I heard that the Siberian Traps are maybe one of the reasons. Is that possible?
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BossMan, Jake
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Son of God

Luca9108
Aug 13 2015, 12:20 PM
CyborgIguana
Aug 13 2015, 11:58 AM
That's what makes the worst mass extinction in Earth's history even scarier: we don't even know exactly what caused it. We just know that over 90% of life on Earth was affected by it.
Thanks for answer. BTW I heard that the Siberian Traps are maybe one of the reasons. Is that possible?
IIRC most of the animals that when extinct were oceanic suggesting that the killer may have come from the oceans. However it is entirely possible to believe that it was caused by massive volcanic activity which if the first theory states true may have been primarily found in the depths of the oceans
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