Diacodexeidae
Diacodexeidae is an extinct family of basal artiodactyl mammals from the Eocene of North America, Europe, and Asia. The family includes some of the earliest known artiodactyls, such as Diacodexis. They were small animals with short snouts, and closely related to the dichobunids, with which they were formerly classified.

Apokryltaros at English Wikipedia · CC BY 2.5 · 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
- ArtiodactylaPBDB
- Diet
- grazer, browserPBDB, for Artiodactyla
- Life habit
- ground dwellingPBDB, for Artiodactyla
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Artiodactyla
Time the record covers
At least 10 million years on record.
The record covers at least 51.1 Mya to 41.03 Mya. No occurrence read is dated outside 56 Mya to 37.71 Mya.
645 occurrences of Diacodexeidae 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
645 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
35 formations
- Willwood Formation373
- Wind River Formation89
- Wasatch Formation51
- DeBeque Formation29
- San Jose Formation14
- "Wasatch" Formation10
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The named rock units Diacodexeidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 further formations hold fewer occurrences each and are not listed. 20 occurrences have no formation on record, which is common for older literature.
Diacodexeidae and its relatives
EoceneWhere Diacodexeidae and its relatives were recorded in the Eocene.
Found in the same rock
797 taxa- Hyopsodus99 sites
- Coryphodon85 sites
- Phenacodus vortmani83 sites
- Diacodexis77 sites
- Diacodexis metsiacus69 sites
- Haplomylus speirianus68 sites
- Paramys copei67 sites
- Sifrhippus grangeri67 sites
- Esthonyx bisulcatus66 sites
- Paramys excavatus58 sites
- Phenacodus53 sites
- Phenacolemurinae52 sites
- Ectocion osbornianus51 sites
- Didymictis49 sites
- Viverravus acutus49 sites
- Thryptacodon antiquus45 sites
- Cantius abditus44 sites
- Prototomus43 sites
- Vulpavus australis43 sites
- Hyracotherium42 sites
- Esthonyx spatularius40 sites
- Hyopsodus loomisi39 sites
- Viverravus39 sites
- Phenacodus intermedius38 sites
The Paleobiology Database records 465 sites for Diacodexeidae, 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
63 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 boundary236
- Synonymies and reidentifications of North American fossil mammals108
- Revision of the Eocene Wind River Faunas, Early Eocene of Central Wyoming. Part 7. Revision of Diacodexis (Mammalian, Artiodactyla)81
- Revision of the Wind River Faunas, Early Eocene of Central Wyoming. Part 10. Bunophorus (Mammalia, Artiodactyla)37
- Early Eocene artiodactyls from the San Juan Basin, New Mexico, and the Piceance Basin, Colorado27
- Les artiodactyles du gisement yprésien terminal de Premontre (Aisne, France)16
- 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, Wyoming14
- Earliest Eocene mammalian fauna from the Paleocene-Eocene Thermal Maximum at Sand Creek Divide, southern Bighorn Basin, Wyoming12
- Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming12
- Stratigraphy, mammalian paleontology, paleoecology, and age correlation of the Wasatch Formation, Fossil Butte National Monument, Wyoming10
- 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 Basin9
- Bunodont artiodactyls (Mammalia) from the Uintan (middle Eocene) of San Diego County, California6
Each of the 645 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. 51 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 Diacodexeidae
- Source
- Wikipedia/Commons
- Credit
- Apokryltaros at English Wikipedia
- Licence
- CC BY 2.5
- 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 itArtiodactyla through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Krishtalka and Stucky 1985