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Re: EARLY EVOLUTION OF 'BIRDS'
At 11:45 AM 11/7/98 -0000, John V Jackson wrote:
> It seems very strange to me though
>that small pterosaurs can be preserved and found by the dozen
>but 20k+ theropods either didn't preserve well or weren't so
>easily noticed. There just possibly *might* be some very wierd
>process hiding those "J mani's" ...
It needn't be all that weird.
A) Most Jurassic pterosaurs are found in only two or three lagerstaetten,
all lakes or lagoons.
B) Pterosaurs can fly, basal maniraptorans most likely could not. Ergo,
pterosaurs are more likely to die where they can end up in a lake than are
the terrestrial mani's.
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