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Re: T-J Extinction event article (more media errors?)
> I didn't know about the temporal extension of therapsids
> into the Early
> Cretaceous. Will have to look into that.
Makoto Manabe, Paul M. Barrett, Shinji Isaji: A refugium for relicts?,
Nature 404, 953 (27 April 2000).
> But as far as cladistically restricting Mammalia to the crown group
I don't advocate that, for the reasons you mention.
> And you don't want to get me started on a crown group