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Re: linguistic analogy
Nick Pharris writes;
>Many features make birds "different enough" for their own category,
>Aves. But that category, Aves, is still part of Dinosauria (and
>Theropoda, Maniraptora, etc.).
If we place the Dinosauria taxa at a superclass level, then I'll
agree with you.
>> Assuming that whales did evolve from ungulates, I suggest that since there
>> been no evolution of new features, just modification and reduction of
>> existing ones, then whales and ungulates to belong together.
>I have two responses to this:
>1) Whales have evolved a whole host of new features. Echolocation, for
>one (secondarily lost in baleen whales), and flukes, and dorsal fins, and
>many modifications to the lungs.
I'll concede your echolocation and fluke points. However, the rest
are simply the result of modifying existing structures.
>2) All of the "new features" of birds are just modifications of those
>found in other maniraptorans. Several dinosaurs have been found with good
O.K. If there is a pre-Archy dino that has a decent sternum, I'll