Temnocyon

Temnocyon is an extinct genus of amphicyonids endemic to North America. It lived from the Oligocene to Early Miocene approximately 30.8—20.4 mya, existing for about 11 million years.^[1]

Temnocyon Temporal range: Early Oligocene to Early Miocene 30.8–20.4 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Skull of Temnocyon ferox
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Suborder:	Caniformia
Family:	†Amphicyonidae
Subfamily:	†Temnocyoninae
Genus:	†Temnocyon Cope, 1878
Species
Temnocyon altigenis Cope, 1878 Temnocyon ferox Eyermann, 1896 Temnocyon fingeruti Hunt jr., 2011 Temnocyon macrogenys Hunt jr., 2011 Temnocyon percussor Cook, 1909 Temnocyon subferox Hunt jr., 2011 Temnocyon typicus Loomis, 1936
Range of Temnocyonines based on fossil record

The first fossils are recorded in North America at Logan Butte in the John Day beds of Oregon, in the Sharps Formation of the Wounded Knee area, South Dakota, and in the Gering Formation at Wildcat Ridge, Nebraska. These early temnocyonines attained the size of coyotes or small wolves (15–30 kg) and are identified by a uniquely specialized dentition. The last documented occurrences of temnocyonines are found in sediments in northwest Nebraska and southeastern Wyoming.^[2]