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According to this new tree, the largest clade of domestic dogs last shared a common ancestor 18,800 years ago, and collectively, they last shared a common ancestor with a wolf around 32,100 years ago. They must have been domesticated at some point during this window. These molecular dates fit with fossil evidence.
In biology and biological taxonomy, a clade is a group consisting of a single common ancestor, all the descendants of that ancestor, and nothing else. Over centuries of work, biological taxonomy has endeavored to split groups into clades, rejecting non-clade classifications, which are referred to as paraphyletic.. group that excludes descendants of a common ancestor isn't a clade. Apes aren't a clade because humans descended from apes and humans generally aren't considered apes. If you include humans and the extinct relatives of humans, like Neanderthals, to be apes, then apes are a clade, but this generally isn't done.