Lambertocyon
Lambertocyon is a genus of ungulates from western North America. Three species are known, making their last appearance in the Late Paleocene Clarkforkian stage.

via iDigBio · via iDigBio. 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
- ArctocyonidaePBDB
- Diet
- omnivorePBDB, for Arctocyonidae
- Life habit
- ground dwellingPBDB, for Arctocyonidae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 3.4 million years on record.
The record covers at least 60.9 Mya to 57.5 Mya. No occurrence read is dated outside 63.4 Mya to 56 Mya.
22 occurrences of Lambertocyon on record, most of them in the Paleocene. 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
22 occurrences- Paleocene100%
These 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
5 formations
- Fort Union Formation11
- DeBeque Formation6
- Black Peaks Formation · Tornillo Group2
- Wasatch Formation1
- Goler Formation1
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The named rock units Lambertocyon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Lambertocyon and its relatives
PaleoceneWhere Lambertocyon and its relatives were recorded in the Paleocene.
Found in the same rock
138 taxa- Plesiadapis churchilli7 sites
- Ignacius frugivorus6 sites
- Phenacodus6 sites
- Ptilodus kummae6 sites
- Thryptacodon australis6 sites
- Phenacodus grangeri5 sites
- Plesiadapis fodinatus5 sites
- Adunator minutus4 sites
- Chiromyoides caesor4 sites
- Ectoganus lobdelli4 sites
- Arctocyon3 sites
- Arctocyon acrogenius3 sites
- Barylambda faberi3 sites
- Bessoecetor septentrionalis3 sites
- Ectocion cedrus3 sites
- Ectocion mediotuber3 sites
- Haplolambda quinni3 sites
- Litocherus lacunatus3 sites
- Nannodectes gidleyi3 sites
- Neoplagiaulax hazeni3 sites
- Phenacodus magnus3 sites
- Phenacodus vortmani3 sites
- Titanoides gidleyi3 sites
- Aaptoryctes ivyi2 sites
The Paleobiology Database records 22 sites for Lambertocyon, 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
7 references- Early Eocene Mammalian Fauna of the Piceance Creek Basin. Northwestern Colorado6
- The Tiffanian Land-Mammal Age (middle and late Paleocene) in the northern Bighorn Basin, Wyoming5
- Mammalian paleontology of the Fort Union Formation (Paleocene), eastern Rock Springs Uplift, Sweetwater County, Wyoming5
- Lambertocyon eximius, a New Arctocyonid (Mammalia, Condylarthra) from the Late Paleocene of Western North America3
- New Records of Eutherian Mammals from the Goler Formation (Tiffanian, Paleocene) of California and Their Biostratigraphic and Paleobiogeographic Implications1
- Synonymies and reidentifications of North American fossil mammals1
- Paleocene mammals and faunal analysis of the Chappo Type Locality (Tiffanian), Green River Basin, Wyoming1
Each of the 22 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. 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 content1

Picture of Lambertocyon
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan of Lambertocyon was found in Sketchfab.
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 itArctocyonidae through timeFormations of the PaleoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Gingerich 1979