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Re: Pterosaur diversity (was: Re: Waimanu)
Interestingly, the Cope's rule apply well to other archosaurs -
particularly dinosaurian - taxa too.
Yes, but only in the Late Cretaceous, and for most but not all clades... and
it all depends quite heavily on the taxon sampling. Anyway, that's what
comes out in my thesis, watch out for a publication in, say, 2 years maybe,
when the discoveries of new fossils will have changed the results several
It seems that there was a trend to gigantism in ornithopoda,
ceratosauria, pachycephalosauria, sauropoda, coelurosauria
For the presacral vertebral column length of sauropods I get a statistically
insignificant decrease. I haven't investigated Coelurosauria alone, but the
birds are a very diverse clade that starts with a big dip in size... For
pachycephalosaurs I'll simply say too few species are known from measurable
remains for any kind of reliable statistics. I got 5 species together.
Ceratosaurs aren't much better known.
Fortunately today there is no such thing like _Quetzalcoatlus_ flying
above us - it would be a hard time to clean the car after parking
bellow a tree on which a bunch of gigantic pterosaur was hanging down.
Forget the hanging down. Pterosaur feet don't have any of the adaptations
that bat feet have. :-)