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>>4) are archaeopteryx and protoavis properly considered birds (if only
>>barely), or are they their own group?
>In most taxonomies, "barley" is enough.
Actually, to some agronomists, "barley" is enough.
Thomas R. Holtz, Jr.
Vertebrate Paleontologist in Exile Phone: 703-648-5280
U.S. Geological Survey FAX: 703-648-5420
Branch of Paleontology & Stratigraphy
MS 970 National Center
Reston, VA 22092