Orohippus

Orohippus is an extinct equid that lived in the Eocene. Its fossils have been unearthed in Oregon, Colorado, Utah, and Wyoming.

Orohippus

Uncredited · CC0 · 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
EquidaePBDB
Diet
browserPBDB, for Equidae
Life habit
ground dwellingPBDB, for Equidae
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 5.2 million years on record.

The record covers at least 51.1 Mya to 45.9 Mya. No occurrence read is dated outside 56 Mya to 37.71 Mya.

Paleocene — about 0 of 69 occurrencesEocene — about 69 of 69 occurrencesEocene57–56 Mya — about 0.1 occurrences56–55 Mya — about 0.7 occurrences55–55 Mya — about 0.7 occurrences55–54 Mya — about 0.7 occurrences54–53 Mya — about 0.7 occurrences53–53 Mya — about 0.7 occurrences53–52 Mya — about 0.7 occurrences52–51 Mya — about 0.7 occurrences51–51 Mya — about 5 occurrences51–50 Mya — about 8 occurrences50–49 Mya — about 8 occurrences49–49 Mya — about 8 occurrences49–48 Mya — about 8 occurrences48–47 Mya — about 8 occurrences47–47 Mya — about 8 occurrences47–46 Mya — about 8 occurrences46–46 Mya — about 4 occurrences46–45 Mya — about 0.2 occurrences45–44 Mya — about 0.2 occurrences44–44 Mya — about 0.2 occurrences44–43 Mya — about 0.2 occurrences43–42 Mya — about 0.2 occurrences42–42 Mya — about 0.2 occurrences42–41 Mya — about 0.2 occurrences41–40 Mya — about 0.2 occurrences40–40 Mya — about 0.2 occurrences40–39 Mya — about 0.1 occurrences39–38 Mya — about 0.1 occurrences38–38 Mya — about 0.1 occurrences38–37 Mya — about 0.0 occurrences51.1 Mya45.9 Mya56.5 Mya37.2 Mya

69 occurrences of Orohippus 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

69 occurrences

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

9 formations

Bridger — 41.70°N, 109.00°WBridger — 41.20°N, 110.50°WBridger — 41.22°N, 109.72°WBridger — 42.70°N, 110.10°WBridger — 42.42°N, 109.35°WBridger — 41.80°N, 110.70°WBridger — 41.77°N, 110.33°WBridger — 41.37°N, 109.82°WBridger — 41.04°N, 110.23°WWind River — 43.20°N, 107.10°WWind River — 43.20°N, 108.20°WWind River — 43.20°N, 107.33°WAycross — 43.70°N, 108.70°WWasatch — 42.70°N, 110.10°WWasatch — 41.80°N, 110.70°WWasatch — 42.37°N, 108.91°WWashakie — 40.60°N, 108.10°WWashakie — 41.70°N, 109.00°WWashakie — 41.33°N, 108.37°WGreen River — 41.20°N, 110.50°WWillwood — 44.30°N, 109.00°WFowkes — 41.31°N, 111.02°W? Tepee Trail — 43.90°N, 110.80°W

Loading coastlines…

The named rock units Orohippus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Orohippus and its relatives

Eocene

Where Orohippus and its relatives were recorded in the Eocene.

Found in the same rock

425 taxa

The Paleobiology Database records 69 sites for Orohippus, 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

25 references

Each of the 69 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. 13 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 content1

Picture of Orohippus

Credit
nobody named on the record
Licence
CC0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itEquidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Marsh 1872