Origin of the domestic dog that was the most divergent group. The study found that the skulls of the "Goyet dog" and the "Altai dog" had some dog-like characteristics and proposed that the may have represented an aborted domestication episode. If so, there may have been originally more than one ancient domestication event for dogs as there was for domestic pigs. One theory is that domestication occurred during one of the five cold Heinrich events that occurred after the arrival of humans in West Europe 37 000, 29 000, 23 000, 16 500 and 12 000 YBP. The theory is that the extreme cold during
New Guinea singing dog gray wolf, the dog is not a descendant of the extant gray wolf but these are sister taxa which share a common ancestor from a ghost population of wolves that went extinct at the end of the Late Pleistocene, and the dog and the dingo are not separate species. The dingo and the basenji are basal members of the domestic dog clade. "The term basal taxon refers to a lineage that diverges early in the history of the group and lies on a branch that originates near the common ancestor of the group." Mitochondrial genome sequences indicates that the dingo