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Re: Sinornis and Cathayornis



Daniel Bensen wrote-

> not to mention C. caudatus.
> Are there now three species of Sinornis?

The poor description and illustration of "Cathayornis" caudatus makes it
difficult to evaluate.  The presence of Sereno et al.'s (2002) Sinornis
apomorphies in the specimen is uncertain, due to poor ischial preservation
and a lack of pygostyle fusion.  The latter may be a juvenile
characteristic, though it is unexpectedly paired with an adult-style
sternum.

Mickey Mortimer
Undergraduate, Earth and Space Sciences
University of Washington
The Theropod Database - http://students.washington.edu/eoraptor/Home.html