Fossilized mammal jaw of a Daphoenus or bear-dog with three teeth still preserved.

A fossilized partial jaw of a Daphoenus sp. from the Brule Formation in Pennington County, South Dakota, USA. Known as bear-dogs, amphicyonids like Daphoenus were basal caniforms related to bears, dogs, and other animals in the clade.

#synapsid #mammal #fossil #paleontology #daphoenus #amphicyonid