re: ornithosuchids

["Jaime A. Headden" <qilongia@yahoo.com>]

Ken Kinman (kinman@hotmail.com) wrote:

<"Ornithes" would not be necessary. If Pterosaurs are non-archosaurs, then we 
can use: (1)
Ornithosuchia (if ornithosuchids are closer to birds than to crocs); or (2) 
Avemetatarsalia if
ornithosuchids are closer to crocs than to birds. That is another reason why 
Crurotarsi (and its
purported "synapomorphies") need to be carefully reevaluated, and the sooner 
the better. Where
Ornithosuchidae fits in is still very uncertain and very controversial.>

  The definition of Crurotarsi does not depend on Ornithosuchus, and thus 
neither does its
content. It's wise not to confuse the two. However, I beleive you are not an 
advocate of formulaic
definitions of clades, or else why the continuing advocacy of concept based 
usage? Anyways...


=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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