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Re: Typo (was Re: K/T Extinction & Birds)
This was directed to me, but I'll answer to the net.
>From: email@example.com (Art Berggreen)
>>>Actually, there are NO known toothed birds in the Mesozoic.
>>Change "in" to "after".
>Are you sure about this? In our local natural history museum is a large
>fossil bird excavated by Dr. Phil Orr in the fifties, from tertiary
>deposits (not many older around here). I'd swear that it's a toothed
>bird, but it's been several years since I've stopped to look at it.
>Seems to me that it was in oligocene deposits. I'll have to look
>into this more when I get a chance.
No bird of the Cenozoic has true teeth (thecodont implantation, enamel,
etc.). However, at least one lineage of birds, and possibly more,
developed tooth-like projections on their beaks. These pseudontorns
("false teeth birds") occur in the same marine deposits as a turtle species
which also has similar structures on its beak!
Thomas R. Holtz, Jr. Phone: 703-648-5280
Vertebrate Paleontologist Fax: 703-648-5420
firstname.lastname@example.org ------------> email@example.com
U.S. Geological Survey -------------> University of Maryland
Branch of Paleontology & Stratigraphy ----> Department of Geology
MS 970 National Center
Reston, VA 22092 -------------> College Park, MD 20742