Linkage disequilibrium and a contact zone in Plethodon cinereus on the Del-Mar-Va Peninsula.

Abstract

Based on the presumed nature of regional climates during the late Pleistocene, it is suggested that the climate was inhospitable for P. cinereus on the Del-Mar-Va Peninsula at the Wisconsin maximum. It is postulated that, after the Laurentide ice sheet receded c 14 000 yr BP, the peninsula was invaded by populations of P. cinereus form the N and S. When the 2 forms of P. cinereus met, a secondary zone of contact was produced. -from Author