Oxyaenidae

oxyaenidoxyaenids
Oxyaenidae is a family of carnivorous mammals.wikipedia
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Creodonta

creodontcreodontscreodine
Traditionally classified in Creodonta, this group may be related to pangolins.
Two distinct families were historically thought to compose the order: Oxyaenidae and Hyaenodontidae.

Hyaenodontidae

hyaenodontidhyaenodontshyaenodontids
Anatomically, characteristic features include a short, broad skull, deep jaws, and teeth designed for crushing rather than shearing, as in the hyaenodonts or modern cats.(Lambert, 163)
They were considerably more widespread and successful than the oxyaenids, the other clade historically considered part of Creodonta.

Palaeonictis

Palaeonictis wingi
Palaeonictis is an extinct hyena-like predatory mammal belonging to the family Oxyaenidae, existing from the late Paleocene to the early Eocene times.

Patriofelis

Patriofelis ferox
Patriofelis (Latin: Father Cat) was a large, cat-like oxyaenid of middle Eocene, some 45 million years ago in North America.

Oxyaena

Oxyaena ("sharp" or "drawn-out" + hyena) is an extinct genus of oxyaenid mammal from the latest Paleocene to early Eocene of North America (most specimens being found in Colorado).

Tytthaena

Tytthaeninae
Tytthaena is an extinct genus of oxyaenid from the late Paleocene of North America.

Sarkastodon

Sarkastodon is an extinct genus of mammal within the creodont family Oxyaenidae that lived during the upper Eocene, approximately 35 million years ago.

Machaeroides

MachaeroidinaeMachaeroides eothenmachaeroidine
Experts have been equally divided over whether Machaeroides and its sister-genus, Apataelurus, belong in Oxyaenidae or Hyaenodontidae, though the most recent studies favor the former.

Family (biology)

familyfamiliessubfamily
Oxyaenidae is a family of carnivorous mammals.

Pangolin

ManidaePholidotapangolins
Traditionally classified in Creodonta, this group may be related to pangolins.

North America

NorthNorth AmericanNA
North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene.

Paleocene

PalaeoceneLate PaleocenePaleocene epoch
North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene.

Europe

EuropeanEUEuropean continent
North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene.

Asia

AsianAsian continentAsian countries
North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene.

Eocene

Late EoceneMiddle EoceneEocene Epoch
North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene.

Plantigrade

plantigrade locomotionsemiplantigradeflat-footed
They were superficially cat-like beasts that walked on flat feet, in contrast to modern cats, which walk or run on their toes.

Digitigrade

semi-digitigradebackward bentdigigrade
They were superficially cat-like beasts that walked on flat feet, in contrast to modern cats, which walk or run on their toes.

Cat

domestic catcatsFelis catus
Anatomically, characteristic features include a short, broad skull, deep jaws, and teeth designed for crushing rather than shearing, as in the hyaenodonts or modern cats.(Lambert, 163)

Fossil

fossilsfossil recordfossilized
They were capable of climbing trees, which is suggested by fossil evidence of their paws.

Hyaenodonta

hyaenodonthyaenodontshyaenodontid
Hyaenodonta (sometimes referred as "Hyaenodontida" ) is an extinct group of hypercarnivorous eutherian mammals, originally classified along with the oxyaenids as part of Creodonta.

Megafauna

megaherbivoremegaherbivoresmegafaunal extinction
Terrestrial mammalian carnivores from several eutherian groups (the artiodactyl Andrewsarchus - formerly considered a mesonychid, the oxyaenid Sarkastodon, and the carnivorans Amphicyon and Arctodus) all reached a maximum size of about 1000 kg (the carnivoran Arctotherium and the hyaenodontid Simbakubwa may have been somewhat larger).

Saber-toothed cat

sabre-toothed catsaber-toothed catssabre-tooth cat
However, usage of the word cat is in some cases a misnomer, as many species referred to as saber-toothed "cats" are not closely related to modern cats of Felidae: instead, many are members of other feliform carnivoran families, such as Barbourofelidae and Nimravidae; the oxyaenid "creodont" genera Machaeroides and Apataelurus; and two lineages of metatherian mammals, the thylacosmilids of Sparassodonta, and deltatheroideans, which are more closely related to marsupials than to the placental mammals of the other orders mentioned.

Carnassial

carnassialscarnassial teeth carnassials or sectorial
In Oxyaenidae, it is M1 and m2 that form the carnassials.

Largest prehistoric animals

Largest prehistoric organismsList of largest prehistoric carnivoranslargest
The largest-known oxyaenid was Sarkastodon weighing in at.

Mentoclaenodon

This genus and its sister-genus Anacodon, and the oxyaenid Machaeroides were the first true mammals to develop saber-teeth.