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Re: Abydosaurus mcintoshi, a new sauropod from the Albian of Utah
Thomas R. Holtz, Jr. <email@example.com> wrote:
> I would be seriously interested in seeing Lusotitan, Europasaurus,
> Sauroposeidon, Paluxysaurus, and Astrodon thrown into the mix!
Further, although there is no overlapping material between _Abydosaurus_ and
_B. altithorax_, there is a brachiosaur skull from the Morrison Formation.
This is USNM 5730, from Felch Quarry 1, Colorado, described by Carpenter and
Tidwell (1998). (This is the skull that was once thought to belong to
_Apatosaurus_, and the source of old _Apatosaurus_ reconstructions that showed
it with a _Camarasaurus_-like skull.) There is no overlapping material between
USNM 5730 and _B. altithorax_, so it is not known if USNM 5730 belongs to
In any case, USNM 5730 is substantially different to the skull of
_Giraffatitan_, and in some ways intermediate between the skulls of
_Camarasaurus_ and _Giraffatitan_. It might be useful to add USNM 5730 to the
phylogenetic analysis as well. Sure, it's only known from skull material; but
_Nemegtosaurus_ and _Quaesitosaurus_ are likewise known only from cranial
material, and have been included in titanosaur matrices.