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Re: Big Dinosaurs, Tiny Genomes

Here's more on the study:




The supplementary data is very interesting.  The one
sauropod in the sample (Apatosaurus sp.) appears to
show a genome size which is intermediate to that of
ornithischians.  Herrerasaurus exhibits an avian
genome size, which might suggest this "avian" genome
size thing goes back quite a ways within theropods
(assuming that Herrerasaurus *is* a theropod.)  

Guy Leahy

--- Jeff Hecht <jeff@jeffhecht.com> wrote:

> At 5:47 PM -0800 3/7/07, Guy Leahy wrote:
> They say that the small genome originated 230 to 250
> million years ago and was present in theropods but
> not ornithischians. They're "not sure" about
> sauropods yet. Am I missing something, or is the
> molecular clock out of phase with the fossil clock
> once again? 
> -- 
> Jeff Hecht, science & technology writer
> jeff@jeffhecht.com  http://www.jeffhecht.com
> 525 Auburn St., Auburndale, MA 02466 USA
> v. 617-965-3834; fax 617-332-4760