Archaeotherium

Uncredited · via Wikidata/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
- EntelodontidaePBDB
- Diet
- omnivorePBDB, for Entelodontidae
- Life habit
- ground dwellingPBDB, for Entelodontidae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Artiodactyla
- Length
- 2 mWikidata
- Mass
- 150 kgWikidata
Time the record covers
At least 15 million years on record.
The record covers at least 33.9 Mya to 18.5 Mya. No occurrence read is dated outside 37 Mya to 16.3 Mya.
67 occurrences of Archaeotherium on record, most of them in the Oligocene. 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
67 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
6 formations
- Brule Formation · White River Group23
- John Day Formation12
- Chadron Formation10
- White River Formation9
- Cypress Hills Formation2
- Turtle Butte Formation1
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The named rock units Archaeotherium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 occurrences have no formation on record, which is common for older literature.
Archaeotherium and its relatives
OligoceneWhere Archaeotherium and its relatives were recorded in the Oligocene.
Found in the same rock
457 taxa- Hesperocyon gregarius18 sites
- Brontotheriidae17 sites
- Daphoenus16 sites
- Mesohippus bairdi16 sites
- Leptomeryx evansi15 sites
- Merycoidodon culbertsonii15 sites
- Palaeolagus haydeni13 sites
- Hypertragulus calcaratus12 sites
- Hyracodon nebraskensis12 sites
- Dinictis11 sites
- Colodon occidentalis10 sites
- Hyracodon10 sites
- Ischyromys typus10 sites
- Poebrotherium wilsoni10 sites
- Subhyracodon10 sites
- Subhyracodon occidentalis10 sites
- Equidae9 sites
- Megalagus brachyodon9 sites
- Miniochoerus gracilis9 sites
- Miohippus9 sites
- Palaeolagus temnodon9 sites
- Paradjidaumo trilophus9 sites
- Poebrotherium9 sites
- Hyaenodon crucians8 sites
The Paleobiology Database records 59 sites for Archaeotherium, and this reads all 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
33 references- Revised chronostratigraphy and biostratigraphy of the John Day Formation (Turtle Cove and Kimberly Members), Oregon, with implications for updated calibration of the Arikareean North American land mammal age6
- Entelodonts from the Big Badlands of South Dakota in the geological museum of Princeton University6
- Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan4
- Mammalian Range Zones in the Chadronian White River Formation at Flagstaff Rim, Wyoming4
- A contribution to the Tertiary geology and paleontology of northeastern Colorado4
- Synonymies and reidentifications of North American fossil mammals3
- A Survey Of The Species Of Entelodonts (Mammalia, Artiodactyla) Of The John Day Basin, Oregon3
- Correlation of the early Oligocene (Chadronian) in northwestern Nebraska3
- Analysis of the Preservation of Community Structure in Assemblages of Fossil Mammals3
- Geology, paleoecology, and paleoclimatology of the Chadron Formation3
- Preliminary biostratigraphy of the White River Group (Oligocene, Chadron and Brule formations) in the vicinity of Chadron, Nebraska2
- Stratigraphic Occurrence and Correlation of Early Tertiary Vertebrate Faunas Trans-Pecos Texas. Part I: Vieja Area2
Each of the 67 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. 21 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 content3

Picture of Archaeotherium
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
Photogrammetry
- Source
- MorphoSource
- Licence
- In Copyright
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Archaeotherium mortoni · UCM:Paleontology:UCM:FossilVert:20455
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEntelodontidae through timeFormations of the OligoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Leidy 1850