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paraphyletic Dromaeosauridae (was: first raptor)
Actually I have long been contemplating whether a paraphyletic Family
Dromaeosauridae giving rise to Aves might be the best way to go. I don't
normally use intermediate taxa like subfamilies, but the Kinman System does
not forbid it, so will give it a try in this case.
Note that in some topologies, the troodonts would be a subfamily
Troodontinae within Family Dromaeosauridae, but I presently prefer them as a
sister family (or possibly as a basal subfamily within Dromaeosauridae?). I
have not decided where Adasaurus should go (near or in Velociraptorines??).
Perhaps troodonts are intermediate between utahraptorines and
dromaeosaurines, but at this point, whose knows:
Tim Williams wrote:
Are _Utahraptor_ and _Achillobator_ more primitive than _Microraptor_ and
_Sinornithosaurus_? I would guess that "primitive" in the context of
eumaniraptorans is extremely relative, since in many analyses the basal
dromaeosaurids are closest to the origin of birds.
Wouldn't it be wonderful if _Microraptor_ + _Sinornithosaurus_ + Aves form
a clade; _Utahraptor_ and _Achillobator_ form a second eumaniraptoran
clade; and the other eumaniraptorans (_Dromaeosaurus_, _Deinonychus_,
_Velociraptor_) form a third. Aves a subset of the Dromaeosauridae? I can
see a few people getting into a flap over that.
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