| ancient and recent evolutionary history of the bruchid beetle, acanthoscelides obtectus say, a cosmopolitan pest of beans. | acanthoscelides obtectus say is a bruchid species of neotropical origin, and is specialized on beans of the phaseolus vulgaris l. group. since the domestication and diffusion of beans, a. obtectus has become cosmopolitan through human-mediated migrations and is now a major pest in bean granaries. using phylogeographic methods applied to mitochondrial dna (mtdna) and nuclear microsatellite molecular markers, we show that the origin of this species is probably further south than mesoamerica, as co ... | 2005 | 15773933 |