Amphicyoninae

Amphicyonidae Temporal range: 22.4–4.9 Ma PreЄ Є O S D C P T J K Pg N Miocene - Oligocene
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Suborder:	†Caniformia
Superfamily:	†Arctoidea
Family:	†Amphicyonidae
Subfamily:	†Amphicyoninae Trouessart (1885)
Genus & Tribes
†Amphicyon genus †Cynelos genus †Ischyrocyon genus †Pliocyon genus †Pseudocyon genus †Ysengrinia genus †Thaumastocyonini tribe

Amphicyoninae is a subfamily of extinct Amphicyonidae, large terrestrial carnivores (bear-dogs) belonging to the suborder Caniformia (meaning "dog-like") and which inhabited North America, Europe, Eurasia, Asia. and Africa from ~22.4—4.9 Ma. Amphicyoninae existed for approximately ~17.5 million years.^[1]

Amphicyoninae was named by Trouessart (1885). It was assigned to Canidae by Matthew (1902); to Ursidae by Ginsburg (1977); and to Amphicyonidae by Hunt (1998).^[2]^[3]^[4]

Members include:

Amphicyon, endemic to Europe and N. America
Cynelos, synonymous with Absonodaphoenus and Hecubides, endemic to N. America
Ischyrocyon, synonymous with Hadrocyon, endemic to N. America
Pliocyon, endemic to N. America
Pseudocyon, synonymous with Amphicyonopsis, endemic to Europe and N. America
Thaumastocyonini, a tribe endemic to Europe
Ysengrinia, endemic to Europe and N. America

Fossil distribution

Specimens have been recovered from:

Midway Site, Gadsden County, Florida ~18.9—18.8 Ma.
Rabbitt Creek Site, Meagher County, Montana ~21.7—18 Ma.
Grimes Landing Site, King William County, Virginia ~17.6 Ma.
Arrisdrift, Namibia ~23.03—11.6 Ma.
Les Beilleaux, France ~20—16.9 Ma.

References

^ Paleobiology Database: Amphicyoninae, age range and collections
^ W. D. Matthew. 1902. New canidae from the Miocene of Colorado. Bulletin of the American Museum of Natural History 16(21):281-290
^ L. Ginsburg. 1977. Les carnivores du Miocene de Beni Mellal (Maroc). Geologie Mediterraneene 4(3):225-240
^ R. M. Hunt. 1998. Amphicyonidae. 196-227