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Is *Eudibamus* a Reptile?
David Marjanovic wrote:
<Heh, heh. If we accept the phylogeny in the Science paper on
Eudibamus, then Mesosauridae belongs into Parareptilia/Anapsida, and
Reptilia has the same content as Sauropsida, so it can be
(yabbadabbadoo) ignored in favor of the latter, and the debate whether
we should call a bird and/or another dinosaur a reptile can be ended.
Like Huxley said in the 19th century, it is a sauropsid.>
It may be both: Sauropsida is a stem-clade, defined as anything
closer to one form than another, whereas Reptilia is a crown-group
node-clade, defined as the most recent common ancestor of a living set
of organisms, including its fossil descendants. In this case,
Sauropsida includes Reptilia, but is still valid in either case. The
content may be the same, but a new fossil could change this, and
*Eudibamus*' only claim to fame will be its hips....
Clade names are not just content related, which they were prior to
distinguishing the nature of their _diagnosis_ and their _definition_.
Good Morning, Neverland!
Jaime A. Headden
Where the Wind Comes Sweeping Down the Pampas!!!!
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