Metamynodon planifrons

Osborn. · Public Domain · 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
- MetamynodonPBDB
- Diet
- browserPBDB, for Metamynodon
- Life habit
- amphibiousPBDB, for Metamynodon
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At most 5.2 million years on record.
Every occurrence read is dated to somewhere between 37 Mya and 31.8 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
4 occurrences of Metamynodon planifrons 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
4 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
3 formations
Loading coastlines…
The named rock units Metamynodon planifrons has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Metamynodon planifrons and its relatives
OligoceneWhere Metamynodon planifrons and its relatives were recorded in the Oligocene.
Found in the same rock
18 taxa- Equidae2 sites
- Aepinacodon americanus1 site
- Archaeotherium mortoni1 site
- Brachyhyops wyomingensis1 site
- Brontotheriidae1 site
- Colodon occidentalis1 site
- Heptacodon curtus1 site
- Hoplophoneus primaevus1 site
- Hyracodon1 site
- Hyracodon priscidens1 site
- Leptomerycidae1 site
- Merycoidodon culbertsonii1 site
- Mesohippus exoletus1 site
- Perchoerus nanus1 site
- Petrophyllia1 site
- Pycnodonte1 site
- Subhyracodon1 site
- Subhyracodon mitis1 site
The Paleobiology Database records 4 sites for Metamynodon planifrons, and this reads all of them. The number is how many of those sites it was catalogued from too.
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
4 references- Preliminary report of a Metamynodon skull from the Byram Formation (Lower Oligocene) in Mississippi1
- Preliminary report of a Metamynodon skull from the Byram Formation (lower Oligocene) in Mississippi1
- Tertiary geology of the Beaver Rim area, Fremont and Natrona Counties, Wyoming1
- Fossil mammals of the Lower Miocene White River beds. Collection of 18921
Each of the 4 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 content2

Picture of Metamynodon planifrons
- Source
- Wikidata/Commons
- Credit
- Osborn.
- Licence
- Public Domain
- Commercial use
- the licence allows 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 itMetamynodon through timeFormations of the OligoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Scott and Osborn 1887