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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,408 Views)
CyborgIguana
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It probably wouldn't have done so normally, but assuming there was a shortage of prey in its usual habitat that drove it to move I could imagine a Smilodon finding itself on a beach.
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Furka
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Paleop
Apr 2 2015, 08:26 PM
2.what specifically killed off the marine reptiles when the asteroid struck?
Most likely the drastic changes in the ecosystem.
Such a dramatic event should have caused a collapse in the food chain, and the largest animals were the first to be affected.
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Incinerox
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Āeksiot Zaldrīzoti

Paleop
Apr 2 2015, 08:26 PM
I has lots of questions c:

1.what are some cretaceous marine reptiles?
2.what specifically killed off the marine reptiles when the asteroid struck?
3.were their skin scaly? or smooth?

4. I'm low on inspiration for dinos to draw, any ideas on what would be fun, challenging, bizarre or beautiful dinos to draw? edit: oh and any that you guys might want me to draw :) )

thank you :)


1) I'm assuming you mean end-cretaceous. So generally things like:
> Elasmosaurids
> Polycotylids (eg. Dolichorhynchops
> Mosasaurs
> Protostegid (Early, giant sea turtles eg. Archelon, Protostega)
> Dermochelyids (Modern leatherbacks)
> Basal Dyrosaurids (Freshwater and marine crocodyliforms)

But pliosaurs and ichthyosaurs were around until the middle Cretaceous or the "early" Late Cretaceous.

2) Climate and ocean current changes which resulted in collapse of ecosystems, killing off the large and specialised marine reptiles first.

3) In terms of texture, shark skin seems to be the most reasonable comparison, although they're still very different in terms of anatomical structure.

4) Throwing a name out there, Therizinosaurus.

AVCDPS
Apr 2 2015, 08:31 PM
AVCDPS
Apr 2 2015, 04:40 PM
Here's some questions:

1. Would a really desperate Smilodon realistically encounter Sea Lions in the wild and try to hunt them? If so then could the Smilodon succeed in hunting the Sea Lions?

2. Could a Protoceratopsid or a Leptoceratopsid realistically have quills, something like Psittacosaurus? And if that is possible could they have the quills cover their body like a Porcupine's? Or would be boar-like bristles be more plausible?
Could someone answer my questions please.


1) You'd be surprised how often sea lions encounter some really unusual predators. Not counting people and polar bears, wolves, mountain lions and other types of bears today can and do take seal and sea lions when available. In other parts of the world, hyenas and jackals do the same. I'm pretty sure there are more terrestrial predators of sea lions out there. The problem is that sea lions tend to deliberately colonise beaches that are difficult for predators to get regular access to, for obvious reasons.

Also, big cats often result to some remarkable hunting behaviours which most would not expect or even bother to consider. Tigers in the Sundarbans actively strike from under water, for example. Not to mention, beaches are a great place for any animal to stumble on an easy meal. Jaguars can and will eat sea turtles and their eggs (in fact, it's been noted that this is an increasing occurance) and while a rare, observations of lions beach combing are a thing.

So if a Smilodon's territory included a beach (which it may well have), it's likely that it (or they) may have spent some time there.

Really it's all down to whether or not sea lions, or anything worth scavenging at all, were in the area.

But under the assumption that sea lions WERE in the area, sure. There's no reason why a Smilodon wouldn't try its luck on an abandoned seal pup, or even go for a small female. Male sea lions probably aren't worth the hassle. THEY'RE HUGE.

2) The trend in ceratopsians was a distinct loss in bristly integument. Psittacosaurus is the only ceratopsian genus known to have quills, and it was also a member of one of its most basal groups. Not to mention, when compared to less derived ornithischians like Kulindadromeus or Tianyulong, FAR less fluff/bristles. By the time you end up with advanced ceratopsians (the Ceratopsidae), you've got the classic, almost old school, dinosaur texture in both of their subclades (giving a strong indication that no bristles is basal to Ceratopsidae). Which is already REALLY close to the Protoceratopsidae. Leptoceratopsids were also within the Coronosauria, but they split off fairly early on.

Basically, the only reasonable answer I can give you is that you're far more likely to get away with putting bristles on a Leptoceratops than you are a Protoceratops, and even then, I'm not certain on Leptoceratops either.
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Mathius Tyra
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Rat snake is love... Rat snake is life

I'm just curious if Pachyrhinosaurus or any ceratopsian in cold region could evolved long thick intergument of some sort... Like how woolly mammoths evolve hair back from their naked ancestor.
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CyborgIguana
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Well, let's ask Mark Witton,shall we?
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Yi Qi
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Mathius Tyra
Apr 3 2015, 11:47 AM
I'm just curious if Pachyrhinosaurus or any ceratopsian in cold region could evolved long thick intergument of some sort... Like how woolly mammoths evolve hair back from their naked ancestor.
Its not impossible, infact, i believe mark witton discussed this idea quite a few times.
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Rudyn
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How Malagasy hippopotamus ,Eupleridae, Plesiorycteropus, tenreck and madagascan pygmy shrew anshestors survive the journey from Africa to Madagascar?
Edited by Rudyn, Apr 3 2015, 06:48 PM.
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Furka
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I thought Tenrecs actually evolved right in Madagascar ?
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Rudyn
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Furka
Apr 3 2015, 06:26 PM
I thought Tenrecs actually evolved right in Madagascar ?
So giant otter shrew,Nimba otter shrew and Ruwenzori otter shrew anchestors arrived from Madagascar?
I thought that tenreck arrive to the island after lemurs from Africa .
Edited by Rudyn, Apr 3 2015, 07:28 PM.
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Taurotragus
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Ooh, what's this? I think I hear the sweet sound of a ban hammer about to come down on another troll.
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Posted Image Guat
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Whoever this "1930" is he or she is either a troll or just really disgusting. This person can't even censor what gross things he or she has to say.

@Diablo-I agree with you.
Edited by Guat, Apr 3 2015, 09:25 PM.
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Taurotragus
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1930 just ruined one of my favorite dinosaurs!! BAN THEM NOW!!!
Edited by Taurotragus, Apr 3 2015, 09:27 PM.
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1930
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Guys please stop being so mean what did I ever do ;(. #truth #heartbreak
Edited by 1930, Apr 3 2015, 09:29 PM.
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Posted Image Guat
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1930
Apr 3 2015, 09:28 PM
Guys please stop being so mean what did I ever do ;(.
Saying sexual things is forbidden here.
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1930
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I don't understand it related to the topic that was what was being asked I only did what it said.
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