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Nigersaurus: the complete picture
Thomas R. Holtz, Jr. writes:
> * With the topology Rebbachisauridae + (Dicraeosauridae + Diplodocidae), a
> low-browsing short-necked morph is the ancestral condition for
> Diplodocoidea.
Er. Why would we assume that this was evolved in basal diplodocoids
and then lost in flagellicaudatans, rather than that it is apopmorphic
for rebbachisaurids (or indeed just for Nigersaurus)?
_/|_ ___________________________________________________________________
/o ) \/ Mike Taylor <mike@indexdata.com> http://www.miketaylor.org.uk
)_v__/\ "Beak in beak, vestigal wing in vestigal wing, with a moonful
of spiracles, he's the Guaranteed Eternal Sanctuary Chicken" --
Nemesis, "Rupper's Steady"