| invasion from the cold past: extensive introgression of mountain hare (lepus timidus) mitochondrial dna into three other hare species in northern iberia. | mitochondrial dna introgression from lepus timidus into lepus granatensis and lepus europaeus was recently reported in iberia, although l. timidus presumably retreated from this region at the end of the last ice age. here we assess the extent of this ancient mtdna introgression by rflp analysis of 695 specimens representing the three hare species present in iberia. the introgressed l. timidus lineage was found in 23 of the 37 populations sampled. it is almost fixed in l. europaeus across its ibe ... | 2005 | 15969727 |