| glacial vicariance and historical biogeography of rock ptarmigan (lagopus mutus) in the bering region. | in this paper, we address alternative hypotheses for the evolution of subspecies of rock ptarmigan (lagopus mutus) endemic to the aleutian archipelago. to do this we examined patterns of genetic differentiation among populations of rock ptarmigan in the aleutian islands and parts of both alaska and siberia. variation in mitochondrial control region sequences of 105 rock ptarmigan from 10 subspecies within the bering region revealed three major phylogenetic lineages, two of which are endemic to t ... | 2000 | 10972767 |