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Re: Declining pterosaur diversity



----- Original Message -----
From: "Jaime A. Headden" <qilongia@yahoo.com>
Sent: Tuesday, November 30, 2004 3:34 AM

 Okay, first, there don't appear to be that many fossil representatives
of any mammal crown groups, and only some questionable avian crown groups
have been identified, including an undescribed "loon," etc.

The loon, *Polarornis*, is described now... and it really seems to be a loon... but there is, ironically, a molecular reason to consider it questionable. More on this later.