Re: Richardoestesia isosceles

["Jaime A. Headden" <qilongia@yahoo.com>]

Phil Bigelow (bigelowp@juno.com) wrote:

<Can someone provide me the ref. for the paper that first describes
_Richardoestesia isosceles_?  Is it a Hell Creek Fm. taxon or a Lance Fm.
taxon?>

  Sankey, J. T. 2001. Late Campanian southern dinosaurs, Aguja Formation,
   Big Bend, Texas. _Journal of Paleontology_ 75(1):208?215.

  The holotype derives from the Aguja Formation, though further material has
been recovered from the Milk River and Scollard Formations of Alberta and the
Judith River Formation of Montana, so this taxon spans the Campanian and
Maastrichtian. Sankey et al. admit (Sankey, Brinkman, Guenther & Currie, 2002)
that it is largely referrable to *R.* based on the small denticles alone, as
the tooth morphology is otherwise distinct, but this a form-taxon treatment.

  Sankey, J. T., Brinkman, D. B., M. Guenther, and P. J. Currie. 2002. Small
   theropod and bird teeth from the Late Cretaceous (Late Campanian) Judith
   River Group, Alberta. _Journal of Paleontology_ 76(4):751-763

  I have both of these papers in PDF if anyone is interested.

  Cheers,

Jaime A. Headden
http://bitestuff.blogspot.com/

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)

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