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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Wed, 26 Apr 2000 00:15:45 GMT
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Viewed:
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302 times
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Jeff Stembel wrote:
> 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. :)
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 be an artefact of "great fossil reptile" thinking.
> > 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." :)
Eh, they go for the least controversial mean. If you really want heightened blood
pressure, go see the AMNH or NHM (London)--that's the home of evolutionary
orthodoxy and the number of propagated sillinesses is stunning. They're both
monuments to colonialism, IMHO, and the idea that the Victorian mind represented
the height of scientific and rational detachment (ha!).
best
Lindsay
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Message is in Reply To:
 | | Re: Evidence of Warm Blooded Dinosaurs
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| (...) 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 (...) (25 years ago, 25-Apr-00, to lugnet.off-topic.fun)
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