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Jacques Gauthier's student Julia Clarke is in the process of clearing up the Ichthyornithiformes mess; I'm not sure but maybe we'll hear about that from her at SVP this year. I don't know about the Judith River material. I haven't seen any diagnostic material at museums I've visited, but what do I know? Don't answer that last part. :)


Tom Holtz wrote:

At 01:04 PM 6/22/99 -0400, Grant Harding wrote:
>Hi all.
>What did _Apatornis_ eat?
>In addition to flying, was it adapted for walking, climbing and/or swimming?

_Apatornis_ is a poorly known ichthyornithiform. By inference from
_Ichthyornis_, it was a flier, walker, and probably could do a little
swimming/diving (but no real particular adapations for the latter two).

Incidentally, does anyone know what material (and how secure the ID is)
there is for _Apatornis_ in the Judith River Group/Dinosaur Park Formation?
If this ID was done prior to the work on enantiornitines, this material
could well be misidentified. The type _A. celer_ material is from the older
Niobrara Chalk of Kansas.

Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:tholtz@geol.umd.edu
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661