these pages were written some years ago. I am not planning to update them. For a more current coverage, see the Palaeos website
(to which many links on these pages point to anyway. More info here
drawing © Darren Naish, 1998
Thecodontian/Basal Archosaurian Systematics - changing perspectives
Palaeos Page (incorporates some of this material, plus a lot of additional material)
Unless otherwise attributed or quoted, all text is licensed under
the Creative Commons License 1.0 and a 2.0. This licence does not cover quoted material, and images, which are copyright their respective owners.
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page by M.Alan Kazlev
page uploaded 3 October 1999. Reposted and last modified 30 August 2005, links updated 16 January 2010