| molecular phylogenetics and biogeography of tanagers in the genus ramphocelus (aves). | ramphocelus tanagers are distributed throughout the neotropical lowlands. in this paper, mitochondrial dna (mtdna) sequence data from cytochrome b and nd2 genes are used to estimate relationships among seven of nine species of the avian genus ramphocelus. genetic differentiation is high between ramphocelus passerinii passerinii and ramphocelus passerinii costaricensis, and the two subspecies are diagnosable and distinct from one another both morphologically and genetically. thus, elevation to sp ... | 1996 | 8728395 |