Esthonyx acutidens

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
- EsthonyxPBDB
- Diet
- herbivorePBDB, for Tillodontia
- Life habit
- ground dwellingPBDB, for Tillodontia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At most 11 million years on record.
Every occurrence read is dated to somewhere between 56 Mya and 45.9 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
28 occurrences of Esthonyx acutidens 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
28 occurrences- Eocene100%
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
Loading coastlines…
The named rock units Esthonyx acutidens 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.
Esthonyx acutidens and its relatives
EoceneWhere Esthonyx acutidens and its relatives were recorded in the Eocene.
Found in the same rock
217 taxa- Lambdotherium popoagicum16 sites
- Paramys copei16 sites
- Coryphodon14 sites
- Hyopsodus wortmani12 sites
- Diacodexis secans11 sites
- Didymictis altidens11 sites
- Heptodon posticus11 sites
- Hyracotherium vasacciense11 sites
- Microsyops scottianus11 sites
- Phenacodus vortmani10 sites
- Vulpavus canavus10 sites
- Absarokius abbotti9 sites
- Bunophorus sinclairi9 sites
- Heptodon calciculus9 sites
- Paramys excavatus9 sites
- Perissodactyla9 sites
- Hyopsodus8 sites
- Prolimnocyon antiquus8 sites
- Cantius nunienus7 sites
- Diacodexis7 sites
- Knightomys depressus7 sites
- Viverravus gracilis7 sites
- Hyopsodus powellianus6 sites
- Hyopsodus walcottianus6 sites
The Paleobiology Database records 28 sites for Esthonyx acutidens, 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
11 references- Revision of the Wind River faunas, early Eocene of central Wyoming. Part 5. Geology and biostratigraphy of the upper part of the Wind River Formation, northeastern Wind River Basin8
- Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming4
- Preliminary analysis of the vertebrate fossil fauna of the Boysen Reservoir area4
- Early Eocene Mammalian Fauna of the Piceance Creek Basin. Northwestern Colorado3
- Fossil Mammalia of the Huerfano Formation, Eocene, of Colorado2
- A Further Study Of The Lower Eocene Mammalian Faunas Of Southwestern Wyoming2
- Wapiti Valley Faunas: Early and Middle Eocene Fossil Vertebrates from the North Fork of the Shoshone River, Park County, Wyoming1
- Esthonyx in the Upper Faunal Assemblage, Huerfano Formation, Eocene of Colorado1
- Geology and mammalian paleontology of the New Fork-Big Sandy area, Sublette County, Wyoming1
- Early Eocene mammalian faunas and their environment in the vicinity of the Rock Springs Uplift, Wyoming1
- The Tillodontia: an early Tertiary order of mammals1
Each of the 28 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 Esthonyx acutidens
- 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 Esthonyx acutidens 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEsthonyx through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1881