Amphicyoninae

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

Better known genera include:

Amphicyon, found in both Europe and N. America
Cynelos, synonyms include Absonodaphoenus and Hecubides, endemic to N. America
Ischyrocyon, Hadrocyon is a synonym, endemic to N. America
Pliocyon, endemic to N. America
Pseudocyon, Amphicyonopsis is a synonym, endemic to Europe and N. America
Thaumastocyonini, a tribe endemic to Europe
Ysengrinia, found in both 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

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