These are the teeth of an African wild dog or painted wolf that has been tranquilized.
One thing you might notice is all the extra cutting edges around the carnassial teeth. These extra blades make it easier for them to bite into the meat of their kills and bolt down the food quickly before lions and hyenas show up to rob them.
Dholes, the closest living relative of the African wild dog, also have similar carnassials, as does the bush dog. This feature evolved in parallel in bush dogs, but for a while, they were often classified with the dhole and African wild dog.
We now know that the bush dog is within the “South American clade” of wild dogs. Its closest relative is the maned wolf.
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Makes one wonder how closely related the South American canines are to the African Painted Dog and Dhole
Good question.
So African wild dogs and dholes are most closely related to the Ethiopian wolf, Golden jackal, and the Holarctic gray wolf boondoggle in the genus Canis. They are more closely related to those canids than the black-backed and side-striped are to those Canids, which means Canis, as currently recognized is a paraphyletic genus.
The South American clade wild dogs are a sister lineage to this wolf-like canid clade (which is all the jackals, gray wolf complex, the Ethiopian wolf, and the dhole/African wild dogs). They evolved in North America first then wandered into South America after the forming of the Isthmus of Panama. They became extinct in North America and then became more greatly diversified in South America.
Here’s a phylogenetic tree based upon the dog genome of the entire dog family:
The dates probably need to be recalibrated. In the case of the gray wolf and coyote, they definitely need recalibration. Also, this was made before golden jackals were split into two species. One is the Eurasian golden jackal, which is really distinct from gray wolves and domestic dogs. It does not readily hybridize with either. The other is now called the African golden wolf, and no one can agree on what to call it. It is much more closely related to gray wolves than to Eurasian golden jackals.