[AndrewC]

It did not exist at the time of the older organism, or we would find them mixed together.

So sinosauropteryx cannot be a predecessor of Archaeopteryx.

[Junior]

Your chart does not bear out your comment.

[gomaaa]

So sinosauropteryx cannot be a predecessor of Archaeopteryx.

Yep. Sinosauropteryx was a Coelurosaur, which were contemporaries of Archaeopteryx and probably shared an ancestor, but were not directly related.

http://www.micro.utexas.edu/courses/mcmurry/spring98/21/justin.html

So what was your point again?