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Modern and historical locations of mites. Because these species do not move long distances, the current locations of species change principally because of continental drift, not because of migration. "By studying a group of organisms with not only an ancient origin, low vagility and restricted habitats but also a present global distribution, we have been able to test biogeographical hypotheses at a scale rarely attempted." Sarah L. Boyer, Ronald M. Clouse, Ligia R. Benavides, P. Sharma, Peter J. Schwendinger, I. Karunarathna, G. Giribet (2007) "Biogeography of the world: a case study from cyphophthalmid Opiliones, a globally distributed group of arachnids," Journal of Biogeography (OnlineEarly Articles). Figure from Carl Zimmer (2007) "A Daddy Longlegs Tells the Story of the Continents’ Big Shifts," The New York Times, 8/28/2007.