Esthonyx

Uncredited · CC0 · 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
- EsthonychinaePBDB
- Diet
- herbivorePBDB, for Tillodontia
- Life habit
- ground dwellingPBDB, for Tillodontia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 4.9 million years on record.
The record covers at least 56 Mya to 51.1 Mya. No occurrence read is dated outside 60.9 Mya to 45.9 Mya.
306 occurrences of Esthonyx 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
306 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
13 formations
- Willwood Formation209
- Wasatch Formation28
- DeBeque Formation26
- Wind River Formation16
- San Jose Formation7
- Lower Variegated Sequence Formation3
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The named rock units Esthonyx has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.
Esthonyx and its relatives
EoceneWhere Esthonyx and its relatives were recorded in the Eocene.
Found in the same rock
694 taxa- Coryphodon101 sites
- Phenacodus vortmani86 sites
- Diacodexis metsiacus83 sites
- Hyopsodus82 sites
- Sifrhippus grangeri69 sites
- Paramys copei68 sites
- Haplomylus speirianus67 sites
- Cantius abditus59 sites
- Ectocion osbornianus58 sites
- Arenahippus pernix57 sites
- Phenacodus57 sites
- Homogalax protapirinus56 sites
- Diacodexis55 sites
- Paramys excavatus51 sites
- Thryptacodon antiquus51 sites
- Viverravus acutus49 sites
- Vulpavus australis49 sites
- Didymictis48 sites
- Phenacodus intermedius46 sites
- Didymictis protenus44 sites
- Phenacolemurinae44 sites
- Hyopsodus loomisi41 sites
- Allognathosuchus39 sites
- Cantius mckennai39 sites
The Paleobiology Database records 296 sites for Esthonyx, and this reads 240 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
43 references- Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary135
- Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming51
- Early Eocene Mammalian Fauna of the Piceance Creek Basin. Northwestern Colorado26
- Synonymies and reidentifications of North American fossil mammals8
- 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
- Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman formations, southern Bighorn Basin, Wyoming7
- Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates6
- The Clarkforkian Land-Mammal Age and Mammalian Faunal Composition Across the Paleocene-Eocene Boundary6
- Systematics and Evolution of the Genus Esthonyx (Mammalia, Tillodontia) in the Early Eocene of North America5
- The mammal fauna of the early Eocene Blackheath Formation of Abbey Wood, London4
- Preliminary analysis of the vertebrate fossil fauna of the Boysen Reservoir area4
- Stratigraphy, mammalian paleontology, paleoecology, and age correlation of the Wasatch Formation, Fossil Butte National Monument, Wyoming3
Each of the 306 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. 31 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 content2

Picture of Esthonyx
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- CC0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
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 itEsthonychinae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1874