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Science 1 September 2006:
Vol. 313. no. 5791, p. 1238
DOI: 10.1126/science.1130964

Technical Comments

Response to Comment on "A Well-Preserved Archaeopteryx Specimen with Theropod Features"

Gerald Mayr* and D. Stefan Peters

We agree that statistical support for our proposed phylogeny is weak, but the monophyly of Aves favored by most current researchers is also weakly supported. In the absence of unambiguous apomorphies of a clade including Archaeopteryx and Confuciusornis but not deinonychosaurs, we do not believe that the statistical comparisons made by Corfe and Butler challenge our hypothesis regarding the ancestry of birds.

Forschungsinstitut Senckenberg, Sektion Ornithologie, Senckenberganlage 25, D-60325 Frankfurt am Main, Germany.

* To whom correspondence should be addressed. E-mail: Gerald.Mayr{at}senckenberg.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)