coelurosaurs Allosaurus-like (was Sino. ischium)

["Ken Kinman" <kinman@hotmail.com>]

    Okay.  For now I'll go with:  "ascending process of astragalus more 
than 21% tibial length, and loss of transverse grooves across condyles."   
As for astragalar height/width ratios, won't these values for Allosaurus and 
Fukuiraptor also be close to those of some coelurosaurs?
       ------ TGIF,
                   Ken   :-)
****************************************
> Mickey Mortimer wrote:
> 25% is a pretty bad choice for the defining point, as Caudipteryx,
> Deinonychus and Velocitaptor have ratios of 22-23%.  As Allosaurus has one
> 21% of tibial length, I think using astragalar height/width ratios to
> diagnose coelurosaurs is a better idea.  The lack of a transverse groove
> across the astragalar condyles works, but the groove was not developed 
> until
> the Neotheropoda, so Dilophosaurus and more basal taxa will not possess it
> either.


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