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Re: Caudipteryx suffered from osteoarthritis
How'd this get past review? The title is 'earliest recognition of
arthritis in birds'. Practically no one consider's Caud. a bird, so
that pretty well undercuts the 'significance' of the article.
And if the reviewers/editors allowed that it was a debatable issue,
then since Martin et al are in the EXTREME minority here, well
shouldn't that have come up?
On Wed, Jan 4, 2012 at 11:20 PM, Brad McFeeters
> Has the sample size of *Caudipteryx* increased recently? Sure, I'm aware
> that there are multiple individuals, but "large population samples" is news
> to me.
> Also, what is the scientific significance of claiming the oldest documented
> case of osteoarthritis in the fossil record? Is susceptibility to
> osteoarthritis a derived condition in amniotes? Is there an observed lack of
> osteoarthritis in Triassic and Jurassic dinosaurs that is anomalous enough to
> deserve explanation?
>> Date: Wed, 4 Jan 2012 19:07:50 -0800
>> From: firstname.lastname@example.org
>> To: email@example.com
>> Subject: Caudipteryx suffered from osteoarthritis
>> From: Ben Creisler
>> A new online article (classifies Caudipteryx as a bird, however):
>> Bruce M. Rothschild, Zheng Xiaoting & Larry D. Martin (2012)
>> Osteoarthritis in the early avian radiation: Earliest recognition of the
>> disease in birds.
>> Cretaceous Research (advance online publication)
>> Osteoarthritis is extremely rare in wild mammal populations (less than 1%)
>> and varies in frequency according to species (0--25%) in recent birds, where
>> it is inversely related to size. Large population samples of Early
>> Cretaceous birds in China permit us to analyze its frequency in one of the
>> earliest avian radiations. In these samples, the larger bird (Caudipteryx)
>> shows a high frequency (30%). The earliest previous documentation of primary
>> osteoarthritis in any animal is in a family of Early Cretaceous dinosaurs
>> (Iguanodontidae). We document its occurrence in a basal bird and in one of
>> the forms considered by some to be a feathered dinosaur. These occurrences
>> are 20 million years older than the next oldest occurrence of osteoarthritis.
Robert J. Schenck
Kingsborough Community College
Physical Sciences Department
S332 ph# 718-368-5792
Follow Me on Twitter: @Schenck
KCC Class Schedule on Google Calendar: http://tinyurl.com/mqwlcy