| both morphological and molecular characters support speciation of south american siskins by sexual selection. | south american siskin radiation was studied by both mitochondrial cytochrome b (mt cyt b) dna sequencing and homologous phenotypic characters; the latter were coded separately according to sex. mixed phenetic and molecular (total evidence) dendrograms were constructed and the corresponding analyses suggest that speciation started in the south american siskin group with a north to south separation (carduelis notata/c. barbata) along the andean spine. a second split may have taken place around the ... | 2001 | 11814061 |