Pleistocene wolf

During the Pleistocene, wolves were widely distributed across the Northern Hemisphere. Some Pleistocene wolves, such as Beringian wolves and those from Japan, exhibited large body size in comparison to modern gray wolf populations. Genetic analysis of the remains of Late Pleistocene wolves suggest that across their range populations of wolves maintained considerable gene flow between each other and thus there was limited genetic divergence between them. Modern wolves mostly draw their ancestry from some Siberian populations of Late Pleistocene gray wolves, which largely replaced other gray wolf populations after the Last Glacial Maximum.