| a molecular phylogeny of the sierra-finches (phrygilus, passeriformes): extreme polyphyly in a group of andean specialists. | the unparalleled avian diversity of the neotropics has long been argued to be in large part the evolutionary consequence of the incredible habitat diversity and rugged topography of the andes mountains. various scenarios have been proposed to explain how the andean context could have generated lineage diversification (e.g. vicariant speciation or parapatric speciation across vertical ecological gradients), yet further study on andean taxa is needed to reveal the relative importance of the differ ... | 2011 | 21807104 |