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> He has also found evidence of _Syntarsus_ at Ghost Ranch
> (meaning there is more than one genus of small theropods among the
Perhaps. Or it is possible that some of the supposedly diagnostic
features of _Syntarsus_ can be variable within a *signle* species.
Colbert, in his book on the GR skeletons, mentions that there is some
variability in the occurance of tarsal fusion among the GR specimens.
He suggests that this may be a growth related change.
If this is the sole reason that Bob Sullivan is suggesting the presence
of Syntarsus at Ghost Ranch, I think the case is weak. I think it would
be necessary to show a correlation between tarsal fusion and other
diagnostic features in order to do so.
The peace of God be with you.