Technical Comments

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

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Science  01 Sep 2006:
Vol. 313, Issue 5791, pp. 1238
DOI: 10.1126/science.1130800


On the basis of new information from the 10th specimen of Archaeopteryx, Mayr et al. (Reports, 2 December 2005, p. 1483) suggested that birds, or avian flight, originated twice. We investigate the statistical support for this phylogenetic hypothesis and show that it is no better supported by available morphological character data than the hypothesis of a single avian origin.

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