Re: Help indentifying dino species!

["Mickey Mortimer" <mickey_mortimer@email.msn.com>]

Alessandro Marisa wrote-

> Are you sure that is K. navajovius, I think it is K. notabilis or K.
> incurvimanus, in my computer I have a draw of the skull of K navajovus and
> is a little different from that draw by Paul.

As I said in my post, gryposaurs are a very jumbled group at present.  Keep
in mind the snout of Kritosaurus is unknown, which may affect your skull
comparison.  There are many opinions as to the synonomy and taxonomy of
gryposaurs at present with Horner, Weishampel, Lucas, Hunt and Brett-Surman
all having their own (often divergent) opinions.  Gryposaurus notabilis
differs from Kritosaurus navajovius in a couple skull features of
questionable importance.  Kritosaurus(?) incurvimanus is thought to be
distinct from Gryposaurus notabilis by Horner, but not Lucas and Hunt.  Then
there's Hadrosaurus foulki, Gryposaurus latidens, Kritosaurus australis,
Anasazisaurus, Naashoibitosaurus and Aralosaurus tuberiferus.  I don't know
nearly enough to have an educated opinion.  You may be right though, while
both Gryposaurus notabilis and Kritosaurus(?) notabilis are known from
complete skeletons and skulls, the holotype of Kritosaurus navajovius is an
incomplete skull and I don't know if good postcrania are known.

Mickey Mortimer

Mickey Mortimer