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Temporal range: 20.6–13.6 Ma
Early Oligocene-Early Miocene
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Amphicyonidae
Genus: Pliocyon
Matthew, 1918
  • P. medius
  • P. ossifragus
  • P. robustus

Pliocyon is genus of large amphicyonid caniformian carnivoran mammals which inhabited North America from the Early Miocene subepoch to the Middle Miocene subepoch 20.6—13.6 Ma, existing for approximately 7 million years.[1]

Pliocyon was named by Matthew in 1918. Its type is Pliocyon medius.


A single specimen was measured by Legendre and Roth in 1988 with an estimated mass of 101.2 kg (223 lbs).[2]


P. medius, P. ossifragus, P. robustus

Sister genera[edit]

Amphicyon, Cynelos (syn. Absonodaphoenus, Hecubides), Ischyrocyon (syn. Hadrocyon), Pseudocyon (syn. Amphicyonopsis), Ysengrinia

Fossil distribution[edit]

Pliocyon has been uncovered in South Florida, Skull Spring, Oregon, and western Nebraska.


  1. ^ Paleobiology Database: Pliocyon, age range and collections
  2. ^ S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology