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Re: Ornithurine diversity
Not to forget that most or even all ornithurines from that region
bought the
farm 10 million years later too, making the point of pre-boundary
competition
somewhat moot.<<<
Well, if ornithurines had speciated to the point of greater diversity
due in part to competative replacement/exclusion of enantiornithines,
then their higher species count and larger range of ecomorphs would
have made them statistically less likely to be totally wiped out.
Obviously Nick's study would only be one data point to try and answer
this question, but until we get others it's certainly suggestive, and
framing the data into a larger hypothesis on K/T extinction can only
spur on similar studies to confirm or refute it, so it seems like a
perfectly reasonable idea to float to me.
Scott Hartman
Science Director
Wyoming Dinosaur Center
110 Carter Ranch Rd.
Thermopolis, WY 82443
(800) 455-3466 ext. 230
Cell: (307) 921-8333
www.skeletaldrawing.com
-----Original Message-----
From: evelyn sobielski <koreke77@yahoo.de>
To: dinosaur@usc.edu
Sent: Thu, 10 Jul 2008 5:08 pm
Subject: Re: Ornithurine diversity
How could it possibly do that? It's Campanian, at least
10 million years
older than the K-Pg boundary, and it's just a few
coracoids. And last but
not least, the complete absence of enantiornithean
coracoids (so far) makes
it impossible to see how the diversity and abundance of eu-
vs
enantiornitheans changed over time.
Not to forget that most or even all ornithurines from that region
bought the
farm 10 million years later too, making the point of pre-boundary
competition
somewhat moot.
Eike
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