Subject:
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Re: Evidence of Warm Blooded Dinosaurs
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Newsgroups:
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lugnet.off-topic.fun
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Date:
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Tue, 25 Apr 2000 20:45:39 GMT
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Viewed:
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1216 times
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In lugnet.off-topic.fun, Lindsay Frederick Braun writes:
> Sproaticus wrote:
>
> > obnotherdinotopic: Brontosauri and related dinos probably gave live birth.
> > Many bronto nests have been found, but no eggs. Additionally, due to the
> > size of the embryonic bronto, the egg shell wouldn've had to been so thick
> > that the mom would've had to *jump* on it for the baby to hatch. ...Then
> > again, that could've been why they went extinct. :-,
>
> Ichthyosaurs absolutely did (there's a famous fossil of an Ophthalmosaurus
> that died while giving birth and was somehow fossilized), so there's no reason
> that archosaurs didn't.
True, however, Ichthyosaurs are definitely not a good example, if you ask me.
Sharks, after all, give birth to live young(I'm not sure about all of them,
but I think they do), so perhaps laying eggs is a poor choice for large
sea-going animals. :) The largest sea-going animal to lay eggs is the sea
turtle, as far as I know, and it has to come on shore to do so. :)
> Oh, regarding that end-of-the-sauropods argument, there are fossil
> representatives of late camarosaurs (I believe) in the late Cretaceous.
I think he was kidding about the jumping part. ;) Personally, I'll hold off
judgement on how sauropods give birth until I know more about it. :) However,
I did not like the ideas presented on the subject by The Discovery Channel's
"Walking with Dinosaurs." :)
Jeff
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Message has 2 Replies:
 | | Re: Evidence of Warm Blooded Dinosaurs
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| (...) The jury's still out on plesiosaurs, mosasaurs, pliosaurs, and so forth--but some people believe that sauroptergyians (IIRC, that's the blanket name for plesio/pliosaurs) actually flippered onto shore to lay eggs like turtles. But that might (...) (26 years ago, 26-Apr-00, to lugnet.off-topic.fun)
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Message is in Reply To:
| | Re: Evidence of Warm Blooded Dinosaurs
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| (...) Ichthyosaurs absolutely did (there's a famous fossil of an Ophthalmosaurus that died while giving birth and was somehow fossilized), so there's no reason that archosaurs didn't. Oh, regarding that end-of-the-sauropods argument, there are (...) (26 years ago, 25-Apr-00, to lugnet.off-topic.fun)
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