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Re: giant toothed bird-species or genus that lasts 50 million yrs?

Le 27/10/2011 14:51, Brian Hathaway a écrit :
This seems to be an awfully long time for a single (or closely related)group of
a species to last (to me)?
Is there anything in the non-avian dino record that is equivalent?



Check heterodontosaurids, for instance. They form a very small clade of which representatives are known from the Late Triassic to the Berriasian (> 60 Ma). And I remind you that pelagornithids includes currently about a dozen genera, and that many fragmentary specimens have been reported all around the world.