| recent range expansion and divergence among north american prairie grouse. | prairie grouse (genus: tympanuchus) once existed throughout much of north america but have recently experienced significant population declines, isolation, and extinction. in previous molecular studies, contrasting patterns or an unresolved polytomy among tympanuchus taxa (tympanuchus phasianellus, tympanuchus pallidicinctus, and tympanuchus cupido) have resulted from traditional phylogenetic methods. as an alternative approach, the timing of expansion and the demographic processes that may have ... | 2008 | 18283050 |