Temporal range: Miocene
Matthew and Gidley (1904)
Ischyrocyon is an extinct genus of large, mostly carnivorous mammals (bone-crushers) known as bear dogs, of the family Amphicyonidae, subfamily Amphicyoninae, which inhabited North America during the Miocene living from ~16.3—10.3 Ma and existed for approximately .
Ischyrocyon was named by Matthew and Gidley (1904). Its type is Ischyrocyon hyaenodus. It was assigned to Amphicyonidae by Matthew and Gidley (1904) and Carroll (1988); and to Amphicyoninae by Hunt (1998).
- 161.9 kg (360 lb). Based on Skull length another specimen was 410kg(903lb)
- Blair Junction, Esmeralda County, Nevada ~14.2—11.7 Ma.
- Hemicyon Quarry Site, San Bernardino County, California ~14.0 Ma.
- Adam Risley Ranch Site, Donley County, Texas ~12—11.7 Ma.
- WaKeeney (Unit C) Trego County, Kansas ~11.8—11.7 Ma.
- Olcott Hill, Sioux County, Nebraska ~11.9 Ma.
- Iron Canyon Site, Kern County, California ~11.8—11.9 Ma.
- Bluejay Quarry Site, Antelope County, Nebraska ~11.8 Ma.
- Paleobiology Database: Ischyrocyon Basic info.
- R. L. Carroll. 1988. Vertebrate Paleontology and Evolution. W.H. Freeman and Company
- S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology 1(1):85-98
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