Hyaenodontidae
Hyaenodontidae is a family of placental mammals in the extinct superfamily Hyaenodontoidea. Hyaenodontids arose during the early Eocene and persisted well into the late Miocene. Fossils of this group have been found in Asia, North America and Europe.

Ghedoghedo · CC BY-SA 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- HyaenodontoideaPBDB
- Diet
- carnivorePBDB
- Life habit
- ground dwellingPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 45 million years on record.
The record covers at least 59.24 Mya to 13.82 Mya. No occurrence read is dated outside 61.66 Mya to 7.246 Mya.
770 occurrences of Hyaenodontidae on record, most of them in the Eocene. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
770 occurrencesThese are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
82 formations
- Willwood Formation349
- Wasatch Formation32
- Bridger Formation31
- Brule Formation · White River Group31
- Ergilin Dzo Formation17
- Hsanda Gol Formation16
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The named rock units Hyaenodontidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 58 further formations hold fewer occurrences each and are not listed. 98 occurrences have no formation on record, which is common for older literature.
Hyaenodontidae and its relatives
EoceneWhere Hyaenodontidae and its relatives were recorded in the Eocene.
Found in the same rock
1,017 taxa- Sifrhippus grangeri81 sites
- Hyopsodus69 sites
- Coryphodon62 sites
- Phenacodus vortmani55 sites
- Viverravus acutus54 sites
- Diacodexis47 sites
- Prototomus45 sites
- Paramys copei44 sites
- Phenacolemurinae43 sites
- Paramys excavatus42 sites
- Esthonyx bisulcatus41 sites
- Haplomylus speirianus39 sites
- Homogalax protapirinus36 sites
- Arenahippus aemulor35 sites
- Didymictis35 sites
- Ectocion osbornianus35 sites
- Phenacodus35 sites
- Arctodontomys wilsoni33 sites
- Apheliscus chydaeus32 sites
- Thryptacodon antiquus32 sites
- Arfia shoshoniensis31 sites
- Didymictis protenus30 sites
- Cantius29 sites
- Cardiolophus radinskyi29 sites
The Paleobiology Database records 530 sites for Hyaenodontidae, and this reads 240 of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
171 references- Systematics and Evolution of Early Eocene Hyaenodontidae (Mammalia, Creodonta) in the Clarks Fork Basin, Wyoming155
- Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary101
- Synonymies and reidentifications of North American fossil mammals51
- Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming38
- Carnivorous mammals from the middle Eocene Washakie Formation, Wyoming, USA, and their diversity trajectory in a post-warming world14
- Earliest Eocene mammalian fauna from the Paleocene-Eocene Thermal Maximum at Sand Creek Divide, southern Bighorn Basin, Wyoming13
- Oligocene stratigraphy across the Eocene and Miocene boundaries in the Valley of Lakes (Mongolia)12
- Valbro : un nouveau site à vertébrés de l’Oligocène inférieur (MP22) de France (Quercy). I – Contexte géologique ; Mammalia : Rodentia, Hyaenodontida, Carnivora [Valbro: A new site of vertebrates from the early Oligocene (MP22) of France (Quercy). I – Geological context; Mammalia: Rodentia, Hyaenodontida, Carnivora]12
- Mammalian Fauna From the Lower Bridger Formation (Bridger A, Early Middle Eocene) of the Southern Green River Basin, Wyoming11
- Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman formations, southern Bighorn Basin, Wyoming11
- Hyaenodontidae (Creodonta, Mammalia) from the Early Eocene Four Mile Fauna and their biostratigraphic implications11
- Sinopaninae and Arfianinae (Hyaenodontida, Mammalia) from the Early Eocene of Europe and Asia; evidence for dispersal in Laurasia around the Paleocene/Eocene boundary and for an unnoticed faunal turnover in Europe10
Each of the 770 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 159 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content2
Picture of Hyaenodontidae
- Source
- Wikipedia/Commons
- Credit
- Ghedoghedo
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHyaenodontoidea through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Leidy 1869