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Re: Late night thoughts: Pathetica and Interspersal

David Marjanovic wrote:

No, David didn't say that at all. What he said was that after a dramatic increase in size that occurred early in their evolution (from _Anchisaurus_-sized to _Isanosaurus_-sized and beyond), sauropods had essentially hit their maximum size by the Middle Jurassic.

No, not that either. I said that after a drastic increase in the size _range_, into both directions, with -- in sum -- _no trend_, the smallest ones (like *Anchisaurus*) died out, and the bigger ones kept diversifying, though neither the minimum nor the maximum size changed much from the MJ onwards.

I read your response a few times, and I still can't figure out how my response is different to your response. This is a distinction without a difference, surely.

Within each of the major sauropod lineages (diplodocoids, brachiosaurids, titanosaurs) average size
appears to have peaked, and then gone downhill.

No, not even. There is no trend. :-)

I was referring to Carrano's study, not yours (because I haven't seen your study).



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