Oxyaenidae

Oxyaenidae is an extinct family of placental mammals known from the Paleocene and Eocene. Its members included predatory forms historically grouped with creodonts.

Creodonta: Creodonta is a historical grouping of extinct predatory mammals, now understood as separate from modern carnivorans. Oxyaenids were once placed within this broad group of extinct predators.
Carnassial: A carnassial is a specialized upper and lower tooth pair that shears flesh in many predatory mammals. Oxyaenid cheek teeth formed shearing surfaces suited to processing meat.
Oxyaena: Oxyaena is a genus of Eocene oxyaenids known from North American fossils. It is the namesake genus and a well-known example of the family.
Hyaenodonta: Hyaenodonta is an extinct group of predatory mammals distinct from Oxyaenidae and modern Carnivora. It was the other major lineage historically included among creodonts.
Paleogene: The Paleogene is the geological period from about 66 to 23 million years ago, spanning the Paleocene, Eocene, and Oligocene. The family’s known history falls within this broader interval.
Paleocene: The Paleocene is the geological epoch spanning roughly 66 to 56 million years ago. The family first appears in the fossil record during this epoch.
Molar: A molar is a posterior tooth used to crush or grind food. The shape and arrangement of oxyaenid molars help distinguish feeding styles within the family.
Patriofelis: Patriofelis is an Eocene genus of large oxyaenid mammals from North America. Its robust build represents one of the larger-bodied members of the family.
Carnivora: Carnivora is the mammalian order that includes cats, dogs, bears, seals, and their extinct relatives. Carnivorans evolved separately from oxyaenids despite similar meat-eating adaptations.
Mammal evolution: Mammal evolution is the diversification and change of mammalian lineages through geological time. Oxyaenidae represents one extinct branch of early placental mammal diversification.

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