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Re: Pterosaur size (Was: Great in the air, not so good underwater)
On 12/12/06, jrc <email@example.com> wrote:
Also, I find the following overall patterns suggestive. Simplified, the
sequence goes; 1). a class appears, reaches maximum size, then disappears.
If the disappearance is not catastrophic, they dwindle in size. 2). New
class appears, reaches maximum size that is _less than the preceding class
maximum_, then dwindles gradually in size. This exact pattern is the rule
(since the mid-Jurassic, anyway), not the exception, for terrestrial
animals. Dwindling giantism, generally, seems to be the rule in the
terrestrial record (insects, amphibians, reptiles...).
------Interesting. The very largest pterosaurs were present at the very end
of the Cretaceous, so apparently the rule doesn't hold for them.
Doesn't seem true for dinosaurs either - the biggest theropods, the
biggest ornithischians, and most of the contenders for biggest
sauropod, are Cretaceous.
Why can't you be a non-conformist just like everybody else?