[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Mesozoic Birds (was Archaeopteryx and Flight)
>Unfortunately, I have not done the full analysis, and the preliminary
>version I did was years ago, based on the data in the first edition
>of "The Fossil Record". Some of the identifications in there seem
>to have changed, at least so it seems from "Fossil Record 2". I need
>to verify that someof the more derived groups are still attributed
>to the Cretaceous. For instance is the Lancian form originally
>identified as a cormorant still so considered? If so, that places
>considerable constraints on times of origin for various groups.
I wouldn't rely too much on the Fossil Record 2, since there have been many
advances in Mesozoic paleornithology in the last few years which couldn't
be incorporated in that volume.
In a recent talk, Alan Feduccia stated that no Mesozoic bird can now
confidently be assigned to any modern order. From his analysis, it looks
like the radiation of Neornithes (= Aves of Gauthier 1986 = the most recent
common ancestor of all modern birds and all descendants of that ancestor)
is mostly a Cenozoic phenomenon.
A volume on Mesozoic Birds is in the works, so in a couple of years we
should have a better picture.
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