Wolf.
Image caption: A clade is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor. Using a phylogeny, it is easy to tell if a group of lineages forms a clade. Imagine clipping a single branch off the phylogeny  all of the organisms on that pruned branch make up a clade. How dogs came to be domesticated – Scientists suggest in a new study that dogs were first domesticated in Europe many thousands of years ago. This is the head of a Pleistocene wolf from the Trou des Nutons cave in Belgium, estimated to be 26,000 years old. This was a particularly large wolf species. 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. Confidence votes 35. A clade is a group consisting of an ancestor and all its descendants-whether the ancestor is a species, a specific population, or even an individual. A group of organisms with a shared ancestor.
http://evolution.berkeley.edu/evolibrary/search/imagedetail.php?id=260&topic_id=&keywords= http://www.cnn.com/2013/11/14/health/dogs-domesticated-europe/index.html http://www.the-scientist.com/?articles.view/articleNo/38279/title/Origin-of-Domestic-Dogs/ http://www.answers.com/Q/What_is_a_clade
what clade is a dog