Acritohippus stylodontus

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
- AcritohippusPBDB
- Diet
- grazer, browserPBDB, for Equinae
- Life habit
- ground dwellingPBDB, for Equinae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At most 18 million years on record.
Every occurrence read is dated to somewhere between 23.04 Mya and 5.333 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
25 occurrences of Acritohippus stylodontus on record, most of them in the Miocene. 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
25 occurrences- Miocene100%
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
3 formations
Loading coastlines…
The named rock units Acritohippus stylodontus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Acritohippus stylodontus and its relatives
MioceneWhere Acritohippus stylodontus and its relatives were recorded in the Miocene.
Found in the same rock
74 taxa- Camelidae7 sites
- Microtomarctus conferta7 sites
- Brachycrus laticeps6 sites
- Merriamoceros coronatus4 sites
- Protepicyon raki4 sites
- Aelurodon asthenostylus3 sites
- Amphicyon ingens3 sites
- Aphelops megalodus3 sites
- Leptocyon leidyi3 sites
- Megahippus mckennai3 sites
- Paracosoryx alticornis3 sites
- Paratomarctus temerarius3 sites
- Tomarctus hippophaga3 sites
- Anchitheriinae2 sites
- Cupidinimus lindsayi2 sites
- Geomyoidea2 sites
- Hesperhys vagrans2 sites
- Hypohippus affinis2 sites
- Merycodontinae2 sites
- Merycodus2 sites
- Miolabis2 sites
- Miospermophilus2 sites
- Osbornodon fricki2 sites
- Parapliohippus carrizoensis2 sites
The Paleobiology Database records 25 sites for Acritohippus stylodontus, 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
5 references- Synonymies and reidentifications of North American fossil mammals13
- Dietary Change and Evolution of Horses in North America8
- Stratigraphic Paleontology of the Barstow Formation in the Alvord Mountain Area, San Bernardino County, California2
- "Merychippus" stylodontus and "M" intermontanus: biostratigraphy and basic morphology of two Barstovian tridactyl horses1
- Stratigraphy and geochronology of Miocene strata in the central Mojave Desert, California1
Each of the 25 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 Acritohippus stylodontus
- 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 Acritohippus stylodontus was found in MorphoSource and Sketchfab.
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 itAcritohippus through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Merriam 1919)