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Re: [Re: Origin of feathers]



> In a message dated 98-05-04 03:21:48 EDT, TomHopp@aol.com writes:
> 
> << Why did Herrerasurus need to bend its WING OOPS ARM in this
>  direction, all the way back in the Triassic? Hmmmm. >>
> 
> Probably because it was descended from arboreal archosaurs that had already
> achieved enough flying ability to require a foldable wing.
> 
> The problems with the brooding hypothesis are (1) there is no compelling need
> to have the feathers on the arms, particularly since they would interfere with
> other useful forelimb functions, such as subduing prey (note the huge claws on
> the manus of _Oviraptor_); elongate, movable feathers exclusively for brooding
> can appear anywhere on the lateral part of the body; and (2) the hypothesis
> doesn't explain other adaptations for flying and arboreal living in theropods,
> such as the proximally reduced, retroverted hallux and the stiffened tail,
> that don't have anything to do with wings.
============================================================================================================================================
How is a stiffened tail helpful in an arboreal lifestyle/ Wouldn't it get in 
the way most of the time and wouldn't it make more sense to have a prehensile 
or semi-prehensile tail? The more parts of you that are anchored the less 
chances that you'll fall right?

As for flying, wouldn't a smaller tail be better? It seems that all of the 
major flying animals were adopting a trend towards smaller and nonexistent 
tails. Dromies and Oviraptors had long tails. So did Herrerasaurs.

Archosaur J


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