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RE: Nanningosaurus (was Re: Planet of the New Papers)
Tim Williams wrote-
(1) WRT your tree, it shows _Gyposaurus_ and _Aralosaurus_ as consecutive
outgroups. This implies that traditional Hadrosaurinae is paraphyletic.
I'm not sure of the current definitions of Hadrosaurinae or Lambeosaurinae,
although Sereno's (1998) stem-based definitions use _Saurolophus_ and
_Parasaurolophus_ as mutually exclusive specifiers. (Incidentally,
TaxonSearch revises these definitions, with the intention of including the
name-giving genera as additional specifiers; but the exact definitions are
addled with regard to content.)
(2) What happens when _Pararhabdodon_ is included?
As Nick is slow to respond...
I'm not sure about Pararhabdodon, but Aralosaurus was recently reidentified
as a lambeosaurine (Godefroit et al., 2004), so Nick's tree doesn't imply a
Godefroit, P., Alifanov, V., and Bolotsky, Y. (2004). A re-appraisal of
Aralosaurus tuberiferus (Dinosauria, Hadrosauridae) from the Late Cretaceous
of Kazakhstan. Bulletin de l`Institut Royal des Sciences Naturelles de
Belgique, Sciences de la Terre 74 (Supplement): 139-154.