To bird or not to bird

Sobre la polémica de si Archaeopteryx es un ave o no.

Xu, X., You, H., Du, K. & Han, F. 2011 An Archaeopteryx-like theropod from China and the origin of Avialae. Nature 475, 465–470

Lee MSY e Worthy TH 2011. Likelihood reinstates Archaeopteryx as a primitive bird. Biology Letters in press. doi: 10.1098/rsbl.2011.0884

Taxon Search by Sereno